CN214583782U - Pressure sensor sealing structure - Google Patents
Pressure sensor sealing structure Download PDFInfo
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- CN214583782U CN214583782U CN202023340058.0U CN202023340058U CN214583782U CN 214583782 U CN214583782 U CN 214583782U CN 202023340058 U CN202023340058 U CN 202023340058U CN 214583782 U CN214583782 U CN 214583782U
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Abstract
The utility model discloses a pressure sensor seal structure, including pressure sensor, tee bend welding set and two templates, pressure sensor fixes and forms the diaphragm chamber in the tee bend welding set, and pressure sensor thickness equals with tee bend welding set horizontal passage length, and two pressure detection end terminal surfaces of diaphragm chamber flush, and two pressure detection end terminal surfaces of diaphragm chamber correspond and seal with two template plane butts, and it has the pressure acquisition hole to open in the template, and this pressure acquisition hole one end communicates with each other with the external world, and the pressure acquisition hole other end corresponds and communicates with each other with pressure sensor. Has the advantages that: the stress effect on the sensor isolation diaphragm in the installation and assembly process is effectively reduced. And the problem that the detection precision of the pressure sensor has deviation due to asymmetric welding in the prior art is solved, and error superposition is avoided.
Description
Technical Field
The utility model belongs to the technical field of the pressure sensor technique and specifically relates to a pressure sensor.
Background
As a commonly used detection sensor, a pressure sensor is often used in industry, for example, in a fluid pressure detection process such as water pressure detection and oil pressure detection.
Among the prior art, pressure sensor and template adopt radial seal and plane seal to combine together, because the sensor is the assembly welding, there is accumulative total assembly error in process of production, influence pressure sensor both ends concentricity and depth of parallelism, cause pressure sensor terminal surface atress uneven, former design satisfies civilian industry occasion, but can not satisfy nuclear power plant, the long-term use of special environment such as high accuracy, pressure sensor and welding cover are connected both ends size and are not uniform, can act on the pressure sensor in inside when leading to the template clamping, sensor assembly stress influences greatly.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a pressure sensor seal structure adopts the sealed mode in plane, welds accurate difficult appearance deviation, remains symmetry welding throughout, improves pressure sensor's detection precision.
In order to achieve the above purpose, the utility model adopts the following specific technical scheme:
a pressure sensor seal structure, its key technology lies in: including pressure sensor, tee bend welding set and two templates, pressure sensor fixes and forms the diaphragm capsule in tee bend welding set, pressure sensor thickness with tee bend welding set lateral passage length equals, two pressure detection terminal surfaces of diaphragm capsule flush, two pressure detection terminal surface correspondences and two of diaphragm capsule the sealed butt of template plane, it has the pressure acquisition hole to open in the template, and this pressure acquisition hole one end communicates with each other with the external world, the correspondence of the pressure acquisition hole other end communicates with each other with pressure sensor.
By adopting the scheme, the end parts of the pressure sensor and the tee joint welding sleeve are mutually flushed, and are in plane butt joint when being clamped by two templates, the two end parts are welded and have equal acting force, the deviation and the asymmetry are not easy to occur, the welding is symmetrical finally, and the precision of the pressure sensor is small. And the end parts of the bellows formed by the pressure sensor and the three-way welding sleeve are flush, so that the two templates can share the acting force when being clamped, and the influence of the assembly stress of the sensor is reduced.
According to a further technical scheme, the template comprises an outer contact surface, an inner contact surface and a side surface, a membrane seat mounting groove is formed in the inner contact surface of the template, the end surface of a pressure detection end of the membrane box just extends into the membrane seat mounting groove, the transverse end surface of a three-way welding sleeve of the pressure detection end of the membrane box is abutted against the bottom of the membrane seat mounting groove, and the edge of the detection end of the pressure sensor is abutted against the bottom of the membrane seat mounting groove through an O-shaped ring; the pressure acquisition holes are three through holes, the transverse through holes of the pressure acquisition holes penetrate through the side faces of the template, and the vertical holes of the pressure acquisition holes penetrate out of the bottoms of the film seat mounting grooves.
Adopt above-mentioned scheme, through the diaphragm capsule mounting groove, assemble diaphragm capsule tip whole to the inslot. And the three-way welding sleeve is also welded in the groove. And the O-shaped ring is adopted for plane butt joint, so that the acting force of stress on the pressure sensor is reduced.
According to a further technical scheme, the two templates are connected through at least two bolts, and the distance between the two templates is equal to the length of the outer diameter of the vertical channel of the three-way welding sleeve.
By adopting the scheme, the two templates firmly fix the diaphragm capsule between the two templates. Effectively avoiding the influence and the effect of external force on the internal welding part.
According to a further technical scheme, the pressure sensor comprises a measuring diaphragm and two pressure measuring components, wherein the two pressure measuring components are symmetrically connected to two measuring surfaces of the measuring diaphragm; the pressure measuring assembly comprises a membrane seat, one surface of the membrane seat facing the measuring membrane is a concave arc surface, the concave arc surface of the membrane seat and the measuring membrane surround to form an oil cavity, isolation coatings are coated on the concave arc surfaces of the membrane seat, a signal oil pipe is embedded in the membrane seat, one end of the signal oil pipe penetrates through the isolation coatings to be communicated with the oil cavity, and the other end of the signal oil pipe penetrates out of the side wall of the membrane seat; one surface of the membrane seat, which is far away from the concave cambered surface, is connected with the plane end of the corrugated base; one surface of the corrugated base, which is far away from the plane end of the corrugated base, is a corrugated surface, and an isolation diaphragm is packaged on the corrugated surface of the corrugated base; and the diaphragm seat and the corrugated base are internally provided with a through pressure oil hole, one end of the pressure oil hole is communicated with the oil cavity, and the other end of the pressure oil hole is abutted to the isolation diaphragm.
By adopting the scheme, when pressure is applied to the pressure measurement assembly, the isolation diaphragm is applied with pressure, the internal oil body is extruded to move along the pressure oil hole so as to extrude the measurement diaphragm, and when pressure difference exists, the measurement diaphragm deviates left and right, so that the output signal of the signal oil pipe deviates, and a differential pressure signal is formed.
According to a further technical scheme, a gasket ring covers the edge of the isolation diaphragm, and the O-shaped ring is abutted to the gasket ring.
By adopting the scheme, the O-shaped ring is abutted to the gasket ring, so that the acting force and extrusion of the O-shaped ring on the isolation diaphragm are effectively reduced.
According to a further technical scheme, a positioning groove is formed in the corrugated surface of the corrugated base, the size of the positioning groove is matched with that of the isolation diaphragm and the size of the gasket ring, and the isolation diaphragm and the gasket ring are sequentially fixed in the positioning groove.
The edge tip of constant head tank a week is directly used for butt template and welding, effectively avoids welding seam and isolation diaphragm contact. The influence of the welding seam on the isolation diaphragm of the pressure sensor is avoided.
According to a further technical scheme, the bottom of the positioning groove is provided with a corrugated bottom surface arranged on the inner ring and a plane bottom surface arranged on the outer ring, and the surface where the corrugated bottom surface is located is in a high-low corrugated shape from inside to outside; the isolation diaphragm comprises an inner ring of corrugated diaphragm and an outer ring of planar diaphragm, and the corrugated diaphragm of the isolation diaphragm is in a high-low corrugated shape from inside to outside; the corrugated diaphragm of the isolation diaphragm is correspondingly arranged on the corrugated bottom surface of the positioning groove, and the planar diaphragm of the isolation diaphragm is correspondingly arranged on the planar bottom surface of the positioning groove; the gasket ring is welded on the plane diaphragm of the isolation diaphragm.
With the above design, the bellows design can detect small pressure changes.
According to a further technical scheme, the signal oil pipe is a hollow silicon oil pipe, a metal conducting wire is adopted, and the other end of the signal oil pipe is plugged through a weld scar.
The signal oil pipe can be used for processing and oil filling of the pressure sensor, is used for oil filling of the pressure sensor, and can also be used for signal detection and transmission.
The utility model has the advantages that: through the pressure sensor and the sealing structure of the pressure sensor, the stress effect on the sensor isolation diaphragm in the installation and assembly process is effectively reduced. And the problem that the detection precision of the pressure sensor has deviation due to asymmetric welding in the prior art is solved, and error superposition is avoided.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a front view of the seal structure;
FIG. 3 is a side view of the seal structure;
FIG. 4 is a cross-sectional view taken at A-A in FIG. 3 and an enlarged view of a portion of the cross-sectional view;
FIG. 5 is a schematic diagram of a pressure sensor configuration;
FIG. 6 is an exploded schematic view of the pressure sensor;
FIG. 7 is a side view of the pressure sensor;
fig. 8 is a sectional view taken at B-B in fig. 7.
Detailed Description
The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.
A pressure sensor sealing structure can be seen from figures 1-4 and comprises a pressure sensor Y, a three-way welding sleeve H and two templates M, wherein the pressure sensor Y is fixed in the three-way welding sleeve H to form a diaphragm capsule, the thickness of the pressure sensor Y is equal to the length of a transverse channel of the three-way welding sleeve H, the end faces of two pressure detection ends of the diaphragm capsule are flush, the end faces of the two pressure detection ends of the diaphragm capsule are correspondingly abutted and sealed with the planes of the two templates M, a pressure acquisition hole is formed in each template M, one end of the pressure acquisition hole is communicated with the outside, and the other end of the pressure acquisition hole is correspondingly communicated with the pressure sensor Y.
In this embodiment, the template M includes an outer surface, an inner contact surface and a side surface, referring to fig. 4, the inner contact surface of the template M is provided with a membrane seat mounting groove, the end surface of the pressure detection end of the membrane cassette just extends into the membrane seat mounting groove, the transverse end surface of the tee-joint welding sleeve H of the pressure detection end of the membrane cassette abuts against the bottom of the membrane seat mounting groove, and the edge of the detection end of the pressure sensor Y abuts against the bottom of the membrane seat mounting groove through an O-ring;
as can be seen from fig. 2 and 4, the pressure collecting holes are three through holes, the transverse through holes of the pressure collecting holes penetrate through the side surface of the template M, and the vertical holes of the pressure collecting holes penetrate through the bottom of the membrane seat mounting groove.
In this embodiment, referring to fig. 4, the two templates M are connected by 4 bolts, and the distance between the two templates M is equal to the length of the outer diameter of the vertical channel of the three-way welding sleeve H. In the embodiment, referring to fig. 1, 4 bolts pass through the three-way welding sleeve H and are fixed by nuts.
In the present embodiment, referring to fig. 6, 5 and 7, the pressure sensor Y includes two pressure measurement assemblies and a measurement diaphragm Y1, and the two pressure measurement assemblies are symmetrically connected to two measurement surfaces of the measurement diaphragm Y1;
referring to fig. 6 and 8, the pressure measurement assembly comprises a diaphragm seat Y2, one surface of the diaphragm seat Y2 facing the measurement diaphragm Y1 is a concave arc surface, the concave arc surface of the diaphragm seat Y2 and the measurement diaphragm Y1 surround to form an oil cavity Y3, the concave arc surface of the diaphragm seat Y2 is coated with an isolation coating Y4, the diaphragm seat Y2 is embedded with a signal oil pipe Y5, one end of the signal oil pipe Y5 penetrates through the isolation coating Y4 to be communicated with the oil cavity Y3, and the other end of the signal oil pipe Y5 penetrates through the side wall of the diaphragm seat Y2; one surface of the membrane seat Y2, which is far away from the concave cambered surface, is connected with the plane end of the corrugated seat Y6; one surface of the corrugated base Y6, which is far away from the plane end of the corrugated base Y6, is a corrugated surface, and an isolation diaphragm Y7 is packaged on the corrugated surface of the corrugated base Y6; and a penetrating pressure oil hole Y8 is formed in the membrane seat Y2 and the corrugated base Y6, one end of the pressure oil hole Y8 is communicated with the oil cavity Y3, and the other end of the pressure oil hole Y8 is abutted against an isolation diaphragm Y7.
Referring to fig. 4, a gasket ring Y9 is covered along the edge of the isolation diaphragm Y7, and the O-ring abuts against the gasket ring Y9.
Referring to fig. 4 and 8, a positioning groove Y10 is formed in the corrugated surface of the corrugated base Y6, the size of the positioning groove is adapted to the size of the isolation diaphragm Y7 and the gasket ring Y9, and the isolation diaphragm Y7 and the gasket ring Y9 are all fixed in the positioning groove Y10 in sequence.
Referring to fig. 7 and 6, the bottom of the positioning groove Y10 is provided with a corrugated bottom surface arranged on the inner ring and a planar bottom surface arranged on the outer ring, and the surface of the corrugated bottom surface is in a corrugated shape from inside to outside;
the isolation diaphragm Y7 comprises a corrugated diaphragm of an inner ring and a planar diaphragm of an outer ring, and the corrugated diaphragm of the isolation diaphragm Y7 is in a corrugated shape from inside to outside;
the corrugated diaphragm of the isolating diaphragm Y7 is correspondingly arranged on the corrugated bottom surface of the positioning groove Y10, and the planar diaphragm of the isolating diaphragm Y7 is correspondingly arranged on the planar bottom surface of the positioning groove Y10;
the gasket ring Y9 is welded to the planar diaphragm of the isolating diaphragm Y7.
Referring to fig. 8 and 4, the signal oil pipe Y5 is a hollow silicon oil pipe, a metal wire is used, and the other end of the signal oil pipe Y5 is plugged by a crater.
Claims (8)
1. A pressure sensor seal structure characterized in that: including pressure sensor (Y), tee bend welded sleeve (H) and two template (M), pressure sensor (Y) are fixed and are formed the diaphragm capsule in tee bend welded sleeve (H), pressure sensor (Y) thickness with tee bend welded sleeve (H) lateral passage length equals, two pressure detection terminal surface of diaphragm capsule flush, two pressure detection terminal surface correspondences of diaphragm capsule are with two template (M) plane butt is sealed, seted up pressure acquisition hole in template (M), this pressure acquisition hole one end communicates with each other with the external world, pressure acquisition hole other end correspondence communicates with each other with pressure sensor (Y).
2. The pressure sensor seal structure according to claim 1, characterized in that: the template (M) comprises an outer display surface, an inner connection surface and a side surface, a membrane seat mounting groove is formed in the inner connection surface of the template (M), the end surface of a pressure detection end of the membrane box just extends into the membrane seat mounting groove, the transverse end surface of a three-way welding sleeve (H) of the pressure detection end of the membrane box is abutted against the bottom of the membrane seat mounting groove, and the edge of the detection end of the pressure sensor (Y) is abutted against the bottom of the membrane seat mounting groove through an O-shaped ring;
the pressure acquisition holes are three through holes, the transverse through holes of the pressure acquisition holes penetrate through the side face of the template (M), and the vertical holes of the pressure acquisition holes penetrate out of the bottoms of the film seat mounting grooves.
3. The pressure sensor seal structure according to claim 1, characterized in that: the two templates (M) are connected through at least two bolts, and the distance between the two templates (M) is equal to the length of the outer diameter of the vertical channel of the three-way welding sleeve (H).
4. The pressure sensor seal structure according to claim 2, characterized in that: the pressure sensor (Y) comprises two pressure measuring assemblies and a measuring diaphragm (Y1), and the two pressure measuring assemblies are symmetrically connected to two measuring surfaces of the measuring diaphragm (Y1);
the pressure measurement assembly comprises a membrane seat (Y2), one surface, facing the measurement membrane (Y1), of the membrane seat (Y2) is a concave arc surface, the concave arc surface of the membrane seat (Y2) and the measurement membrane (Y1) are surrounded to form an oil cavity (Y3), the concave arc surface of the membrane seat (Y2) is coated with an isolation coating (Y4), a signal oil pipe (Y5) is embedded in the membrane seat (Y2), one end of the signal oil pipe (Y5) penetrates through the isolation coating (Y4) to be communicated with the oil cavity (Y3), and the other end of the signal oil pipe (Y5) penetrates out of the side wall of the membrane seat (Y2);
one surface of the membrane seat (Y2) far away from the concave cambered surface is connected with the plane end of the corrugated base (Y6);
one surface of the corrugated base (Y6) far away from the plane end is a corrugated surface, and an isolation diaphragm (Y7) is packaged on the corrugated surface of the corrugated base (Y6);
and a penetrating pressure oil hole (Y8) is formed in the membrane seat (Y2) and the corrugated base (Y6), one end of the pressure oil hole (Y8) is communicated with the oil cavity (Y3), and the other end of the pressure oil hole (Y8) is abutted to the isolation membrane (Y7).
5. The pressure sensor seal structure according to claim 4, characterized in that: a gasket ring (Y9) is covered along the edge of the isolation diaphragm (Y7), and the O-shaped ring is abutted with the gasket ring (Y9).
6. The pressure sensor seal structure according to claim 5, characterized in that: a positioning groove (Y10) is formed in the corrugated surface of the corrugated base (Y6), the size of the positioning groove is matched with that of the isolation diaphragm (Y7) and the gasket ring (Y9), and the isolation diaphragm (Y7) and the gasket ring (Y9) are fixed in the positioning groove (Y10) in sequence.
7. The pressure sensor seal structure according to claim 6, characterized in that: the bottom of the positioning groove (Y10) is provided with a corrugated bottom surface arranged on the inner ring and a plane bottom surface of the outer ring, and the surface where the corrugated bottom surface is located is in a corrugated shape from inside to outside;
the isolation diaphragm (Y7) comprises an inner ring of corrugated diaphragm and an outer ring of planar diaphragm, and the corrugated diaphragm of the isolation diaphragm (Y7) is in a corrugated shape from inside to outside;
the corrugated diaphragm of the isolating diaphragm (Y7) is correspondingly arranged on the corrugated bottom surface of the positioning groove (Y10), and the plane diaphragm of the isolating diaphragm (Y7) is correspondingly arranged on the plane bottom surface of the positioning groove (Y10);
the gasket ring (Y9) is welded to the flat diaphragm of the isolating diaphragm (Y7).
8. The pressure sensor seal structure according to claim 4, characterized in that: the signal oil pipe (Y5) is a hollow silicon oil pipe, the material of the signal oil pipe is a metal conducting wire, and the other end of the signal oil pipe (Y5) is plugged by a crater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023340058.0U CN214583782U (en) | 2020-12-31 | 2020-12-31 | Pressure sensor sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023340058.0U CN214583782U (en) | 2020-12-31 | 2020-12-31 | Pressure sensor sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214583782U true CN214583782U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023340058.0U Active CN214583782U (en) | 2020-12-31 | 2020-12-31 | Pressure sensor sealing structure |
Country Status (1)
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|---|---|
| CN (1) | CN214583782U (en) |
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2020
- 2020-12-31 CN CN202023340058.0U patent/CN214583782U/en active Active
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