CN210005152U

CN210005152U - pressure sensor

Info

Publication number: CN210005152U
Application number: CN201921164294.6U
Authority: CN
Inventors: 吴明月; 何恩军
Original assignee: Zhejiang Yaoda Intelligent Sci-Tech Co Ltd
Current assignee: Zhejiang Yaoda Intelligent Sci-Tech Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-01-31
Anticipated expiration: 2029-07-23

Abstract

The utility model provides an novel pressure sensor, belong to mechanical technical field, it has solved the not high problem of current pressure sensor response precision novel pressure sensor, including base and the casing of setting on the base, the outer end of base is the end of intaking, is equipped with the diaphragm between base and the casing, and the diaphragm forms the intake antrum with the inside wall of base, and the end of intaking is linked together with the intake antrum, is equipped with kicking block and spring in the casing, and the spring promotes the kicking block and supports and lean on the diaphragm, has linked firmly magnet on the kicking block, has linked firmly hall sensor and can respond to magnet on the casing, this novel pressure sensor has the higher advantage of response precision.

Description

pressure sensor

Technical Field

The utility model belongs to the technical field of machinery, a kinds of sensors are related to, especially kind novel pressure sensor.

Background

For example, pressure sensors employ strain gauges wired in a bridge configuration and bonded to a diaphragm, where pressure applied to the pressure sensor causes a diaphragm to deform, which introduces strain into the strain gauge.

and others are assembled using crimped parts and others use crimped metal elements during pressure sensor assembly here, crimping may be used to locate a seal employed by the pressure sensor to prevent contaminants from entering the pressure sensor during pressure sensor assembly or more elements are typically crimped during pressure sensor assembly increasing the cost and/or complexity of assembling the pressure sensor.

For example, pressure sensors (application number: 201720176407.9) disclosed in chinese patent documents include a base and a cylindrical housing disposed on the base, the outer end of the base is provided with a water inlet end, the middle part of the inner end of the base is vertically provided with a cylindrical mounting protrusion, the mounting protrusion and the water inlet end are axially provided with a water inlet hole therethrough, the outer side of the mounting protrusion is sleeved with and positioned with a cylindrical pressure chip, the outer end of the mounting protrusion is annularly provided with a shoulder, the shoulder is sleeved with a sealing ring, and the outer side wall of the sealing ring abuts against the inner side wall of the pressure chip to form a radial seal.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, proposed novel pressure sensor that response precision is higher.

kinds of novel pressure sensor, including the base and set up the casing on the base, the outer end of base be the end of intaking, its characterized in that, the base with the casing between be equipped with the diaphragm, the diaphragm with the inside wall of base form the intake antrum, the end of intaking with the intake antrum be linked together, the casing in be equipped with kicking block and spring, the spring promote the kicking block support and lean on the diaphragm on, the kicking block on link firmly magnet, the casing on link firmly hall sensor just hall sensor can respond to magnet.

When using, rivers enter into the intake antrum through the end of intaking, promote the diaphragm through water pressure and up remove, and the diaphragm promotes the kicking block and drives magnet and rise, through the change of hall sensor response magnetic induction line to response water pressure has the higher advantage of response precision.

In the above kinds of novel pressure sensors, the lower end of the casing and the inner end of the base between which a bottom support is positioned, the bottom support includes an annular positioning portion, the positioning portion is abutted against the outer edge of the diaphragm, the inner edge of the positioning portion is vertically provided with a spacing portion and the spacing portion is arranged along the inner edge of the positioning portion.

In the novel pressure sensors, the outer side of the lower end of the top block is provided with an annular convex shoulder, and the upper end face of the limiting part can abut against the annular convex shoulder.

In the new pressure sensors, the upper end face of the positioning part is abutted against the lower end face of the shell, the lower end face of the positioning part extrudes the outer edge of the diaphragm, the two end faces of the positioning part are planar, the outer edge of the diaphragm is positioned by the positioning part, the positioning effect is good, and the damage to the diaphragm is avoided.

In the novel pressure sensors, the thickness of the diaphragm is 0.42-0.88 mm, and the arrangement has the advantage of higher sensing precision of the diaphragm.

In the new pressure sensors, an annular groove is provided on the outer side of the top block, and the lower end of the spring is embedded in the annular groove.

In the above kinds of novel pressure sensors, the top of the top block is provided with a positioning groove, the magnet is columnar and the magnet is embedded in the positioning groove, meanwhile, the magnet is positioned in the spring to magnetize the spring, and the magnetic induction line is cut off and transferred, so that the Hall sensor has the advantage of more stable induction magnet.

In the novel pressure sensors, a through hole is axially formed in the middle of the top block, and the upper end of the through hole is communicated with the positioning groove.

In the novel pressure sensors, the diaphragm is in a water wave shape, and the wave shape of the diaphragm is coaxially arranged.

In the novel pressure sensors, the upper end of the limiting part is fixedly connected with a cushion pad, and the annular shoulder can abut against the cushion pad, so that the cushion pad has a determined cushion effect on the annular shoulder and the limiting part.

In the novel pressure sensors, the outer end cover of the base is provided with the mounting shell, the middle part of the mounting shell is provided with the connecting hole, and the base penetrates through the connecting hole.

In the new pressure sensors, the upper end of the casing is provided with a positioning groove and the hall sensor is embedded in the positioning groove.

Compared with the prior art, the novel pressure sensors have the following advantages:

1. the diaphragm is pushed to move upwards through water pressure, the top block is pushed by the diaphragm to drive the magnet to ascend, and the Hall sensor is used for sensing the change of the magnetic induction lines, so that the water pressure is sensed, and the advantage of higher sensing precision is achieved;

2. the thickness of the diaphragm is 0.42-0.88 mm, so that the sensing precision of the diaphragm is higher;

3. by arranging the bottom support positioning membrane, the positioning device has the advantages of good positioning effect, convenience in assembly and disassembly and convenience in manufacture;

4. magnet inlays in positioning groove, and magnet is located the spring simultaneously, with the spring magnetization, the magnetic induction line is cut off and is shifted, makes hall sensor response magnet advantage more stable.

Drawings

Fig. 1 is a perspective view of the novel pressure sensors.

Fig. 2 is a schematic cross-sectional view of the novel pressure sensors.

Fig. 3 is another structural schematic diagrams of novel pressure sensor diaphragms.

FIG. 4 is a schematic cross-sectional view of the bottom brace and cushion of the present sensor.

In the figure, 1, a base; 1a, a water inlet end; 1b, a water inlet cavity; 2. a housing; 2a, a positioning groove; 3. a membrane; 4. a top block; 4a, an annular shoulder; 4b, an annular groove; 4c, positioning a groove; 4d, through holes; 5. a spring; 6. a magnet; 7. a Hall sensor; 8. bottom bracing; 8a, a positioning part; 8b, a limiting part; 9. a cushion pad; 10. mounting a shell; 10a, connecting hole.

Detailed Description

The following is a description of the technical solution of the present invention in steps with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, novel pressure sensor, including base 1 and the casing 2 of setting on base 1, base 1's outer end is intake end 1a, be equipped with diaphragm 3 between base 1 and the casing 2, diaphragm 3 forms intake antrum 1b with base 1's the inboard wall, intake end 1a is linked together with intake antrum 1b, be equipped with kicking block 4 and spring 5 in the casing 2, spring 5 promotes kicking block 4 and supports and lean on diaphragm 3, magnet 6 has been linked firmly on kicking block 4, casing 2's upper end is equipped with constant head tank 2a and constant head tank 2a internal fixation has hall sensor 7, hall sensor 7 can respond to magnet 6.

A bottom support 8 is positioned between the lower end of the shell 2 and the inner end of the base 1, the bottom support 8 comprises an annular positioning portion 8a, the positioning portion 8a is abutted against the outer edge of the diaphragm 3, and the inner edge of the positioning portion 8a is vertically provided with a limiting portion 8b and a limiting portion 8b is arranged along the inner edge of the positioning portion 8 a.

The lower extreme outside of kicking block 4 has annular convex shoulder 4a, and the up end of spacing portion 8b can support and lean on annular convex shoulder 4a, has better spacing effect to kicking block 4, avoids the excessive extrusion to diaphragm 3, has improved diaphragm 3's life.

The up end of location portion 8a supports and leans on the lower terminal surface of casing 2, and the lower terminal surface of location portion 8a extrudes on the outer edge of diaphragm 3, and the both ends of location portion 8a are personally submitted planarly, and the outer edge location to diaphragm 3 through location portion 8a has the location effect better, avoids damaging diaphragm 3.

The thickness of the membrane 3 is 0.42 to 0.88mm, preferably, the thickness of the membrane 3 is 0.6mm, so that the membrane 3 has the advantage of high sensing precision, and as another ways, as shown in fig. 3, the membrane 3 is in a water wave shape and the wave shape of the membrane 3 is coaxially arranged, so that the membrane 3 has the advantages of high strength, long service life and more precise sensing.

The outside of kicking block 4 is equipped with annular groove 4b, and the lower extreme of spring 5 inlays in annular groove 4 b. The upper end of kicking block 4 is equipped with positioning groove 4c, and magnet 6 is the column and magnet 6 inlays in positioning groove 4c and in. The middle part axial of kicking block 4 is equipped with the through-hole 4d that runs through, and the upper end and the positioning groove 4c of through-hole 4d are linked together, have better location effect to the lower extreme of spring 5.

As another ways, as shown in fig. 4, the upper end of the position-limiting part 8b is connected with the cushion pad 9, and the annular shoulder 4a can abut on the cushion pad 9, so that the annular shoulder 4a and the position-limiting part 8b have a buffering effect of .

The outer end cover of base 1 is equipped with installation shell 10, and the middle part of installation shell 10 is equipped with connecting hole 10a and base 1 passes connecting hole 10a, has the comparatively convenient advantage of manufacturing and installation.

When using, rivers enter into intake antrum 1b through end 1a of intaking, promote diaphragm 3 through water pressure and up remove, and diaphragm 3 promotes kicking block 4 and drives magnet 6 and rise, through the change of hall sensor 7 response magnetic induction line to response water pressure has the higher advantage of response precision. Because magnet 6 inlays in positioning groove 4c, magnet 6 is located spring 5 simultaneously, magnetizes spring 5, and the line of magnetic induction is cut off and is shifted, makes hall sensor 7 response magnet 6 more stable advantage. Through setting up above-mentioned bottom sprag 8 location diaphragm 3, it is comparatively convenient to have the better and dismouting of location effect, has the comparatively convenient advantage of manufacturing simultaneously.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the base 1, the water inlet end 1a, the water inlet chamber 1b, the housing 2, the positioning groove 2a, the diaphragm 3, the top block 4, the annular shoulder 4a, the annular groove 4b, the positioning groove 4c, the through hole 4d, the spring 5, the magnet 6, the hall sensor 7, the bottom support 8, the positioning portion 8a, the stopper portion 8b, the buffer pad 9, the mounting case 10, the connecting hole 10a, etc. are used more frequently, the possibility of using other terms is not excluded.

Claims

The utility model provides an novel pressure sensor, including base (1) and casing (2) of setting on base (1), the outer end of base (1) for intaking end (1a), its characterized in that, base (1) with casing (2) between be equipped with diaphragm (3), diaphragm (3) with the inside wall of base (1) form intake antrum (1b), intake end (1a) with intake antrum (1b) be linked together, casing (2) in be equipped with kicking block (4) and spring (5), spring (5) promote kicking block (4) support and lean on diaphragm (3) on, kicking block (4) on link firmly magnet (6), casing (2) on link firmly hall sensor (7) and hall sensor (7) can respond to magnet (6).
2. The novel pressure sensors of claim 1, wherein a bottom brace (8) is positioned between the lower end of the housing (2) and the inner end of the base (1), the bottom brace (8) includes an annular positioning portion (8a), the positioning portion (8a) abuts against the outer edge of the diaphragm (3), a limiting portion (8b) is vertically arranged on the inner edge of the positioning portion (8a) and arranged along the inner edge of the positioning portion (8a), an annular shoulder (4a) is arranged on the outer side of the lower end of the top block (4), and the upper end face of the limiting portion (8b) can abut against the annular shoulder (4 a).
3. The novel pressure sensor of claim 2, wherein the upper end face of the positioning part (8a) abuts against the lower end face of the housing (2), and the lower end face of the positioning part (8a) presses the outer edge of the diaphragm (3).
4. The novel pressure sensors according to claim 1, 2 or 3, wherein the thickness of the diaphragm (3) is 0.42-0.88 mm.
5. novel pressure sensor according to claim 1, 2 or 3, wherein the outside of the top block (4) is provided with an annular groove (4b), and the lower end of the spring (5) is embedded in the annular groove (4 b).
6. The novel pressure sensors according to claim 1, 2 or 3, wherein a positioning groove (4c) is formed in the upper end of the top block (4), the magnet (6) is columnar, and the magnet (6) is embedded in the positioning groove (4 c).
7. novel pressure sensor according to claim 6, wherein, the center of the top block (4) is provided with a through hole (4d) axially therethrough, and the upper end of the through hole (4d) is communicated with the positioning groove (4 c).
8. The novel pressure sensor according to claim 1, 2 or 3, wherein the diaphragm (3) is in the shape of a water wave and the waves of the diaphragm (3) are coaxially arranged.
9. novel pressure sensor according to claim 2, characterized in that the upper end of the limiting part (8b) is connected with a cushion pad (9) and the annular shoulder (4a) can abut against the cushion pad (9).
10. A new type pressure sensor according to claim 1, 2 or 3, wherein the outer end of the base (1) is covered with a mounting shell (10), a connecting hole (10a) is formed in the middle of the mounting shell (10) and the base (1) passes through the connecting hole (10 a).