CN212807432U

CN212807432U - Flat pressure sensor

Info

Publication number: CN212807432U
Application number: CN202021467696.6U
Authority: CN
Inventors: 邱丰; 孙倩
Original assignee: Suzhou Lanmei Electronics Co ltd
Current assignee: Suzhou Lanmei Electronics Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-03-26
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a pressure sensor of platykurtic, which comprises a housin, the casing inboard is provided with elastic substrate, and elastic substrate upper surface is provided with the resistance strain gauge, and resistance strain gauge both ends are provided with the lead wire simultaneously, the casing is inside to be separated for high-pressure chamber and low pressure chamber through elastic substrate, and the high-pressure chamber sets up in low pressure chamber below, the casing bottom is provided with the honeycomb duct, and inside the shoulder hole of having seted up of honeycomb duct, the inside upside sliding connection of shoulder hole has the sealing member. This platykurtic pressure sensor is provided with slider, compression spring and shoulder hole, is surveyed the medium and extrudees the slider, and the slider passes through compression spring extrusion sealing member when gliding along the shoulder hole, makes the sealing member pass through sealed oil extrusion elasticity base plate, and when lacking in the container and being surveyed the medium, compression spring promotes slider reverse slip, and the slider promotes remaining medium of being surveyed and breaks away from the shoulder hole, avoids being surveyed the problem of medium dry and hard in the shoulder hole.

Description

Flat pressure sensor

Technical Field

The utility model relates to a pressure sensor technical field specifically is a pressure sensor of platykurtic.

Background

Pressure sensors are detection devices used to measure the pressure of a gas or liquid and are widely used in various industrial autonomous environments.

The existing pressure sensor is not provided with a cleaning structure usually, the measured medium directly contacts the pressure-receiving piece, but when detecting partial liquid medium, the liquid medium contains non-volatile substances, when stopping detection, the partial substances are dried and knotted in the drainage hole, the movement of the pressure-receiving piece in the drainage hole is blocked, the detection precision of the pressure sensor is influenced, the existing pressure sensor is usually an elongated piece, and the pressure-receiving piece is installed on a measured container through threads outside a flow guide pipe, the fixing structure is single, the pressure-receiving piece is easy to be influenced by the thread deformation, the axial load, the transverse load and other reasons, the threaded connection is loosened, the existing pressure sensor is not stable enough in installation, and the pressure-receiving piece is required to be improved on the existing equipment aiming at the problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure sensor of platykurtic to current pressure sensor who proposes in solving above-mentioned background art does not generally be provided with the clearance structure, it receives the piece to be surveyed medium direct contact, but when detecting partial liquid medium, contain the material that can not volatilize in its liquid medium, time measuring stopping examining, this part material is in the inside dry and hard of drainage hole, it is obstructed to lead to receiving the piece in the downthehole activity of drainage, influence this pressure sensor's detection precision, and current pressure sensor installs the problem firm inadequately.

In order to achieve the above object, the utility model provides a following technical scheme: a flat pressure sensor comprises a shell, wherein an elastic substrate is arranged on the inner side of the shell, a resistance strain gauge is arranged on the upper surface of the elastic substrate, leads are arranged at two ends of the resistance strain gauge, the interior of the shell is divided into a high-pressure cavity and a low-pressure cavity through the elastic substrate, the high-pressure cavity is arranged below the low-pressure cavity, a flow guide pipe is arranged at the bottom of the shell, a stepped hole is formed in the flow guide pipe, a sealing element is connected to the upper side inside the stepped hole in a sliding manner, a sliding element is connected to the inner part of the stepped hole in a sliding manner, the sliding element is connected with the sealing element through a compression spring, sealing oil is arranged between the sealing element and the elastic substrate, an air hole is formed in the top of the shell and communicated with the low-pressure cavity, a flange, and the sealing gasket is arranged outside the flow guide pipe.

Preferably, the sealing element and the stepped hole and the sliding element and the stepped hole are in sliding sealing connection.

Preferably, the lowest end of the sliding part and the lowest end of the stepped hole are located on the same horizontal plane, and the height of the sliding part is larger than the distance between the lowest end of the sealing part and the small hole of the stepped hole.

Preferably, the sliding piece is positioned in the middle of a large hole of the stepped hole.

Preferably, the bolts are distributed in an annular array by taking the center line of the shell as the center.

Preferably, the sealing gasket is annular, and the central line of the sealing gasket and the central line of the flow guide pipe are positioned on the same vertical line.

Compared with the prior art, the beneficial effects of the utility model are that: the flat-shaped pressure sensor is provided with a pressure sensor,

(1) the sliding part is extruded by a detected medium, the sealing element is extruded by the compression spring while the sliding part slides along the stepped hole, so that the sealing element extrudes the elastic base plate through sealing oil, when the detected medium is absent in the container, the compression spring pushes the sliding part to slide in the opposite direction, and the sliding part pushes the residual detected medium to be separated from the stepped hole, so that the problem that the detected medium is dried and solidified in the stepped hole is avoided;

(2) be provided with flange, bolt and sealed the pad, the easy surface of casing bottom laminating, inside the honeycomb duct embedding container, six bolts run through flange and container threaded connection simultaneously, and six bolt cooperations make the locking force more even, have improved the locking effect, and the sealed pad between casing and the container plays sealed effect.

Drawings

FIG. 1 is a schematic view of the cross-sectional structure of the present invention;

FIG. 2 is a schematic top view of the cross-sectional structure of the present invention;

fig. 3 is a schematic view of the top view structure of the present invention.

In the figure: 1. the sealing structure comprises a shell, 2, an elastic substrate, 3, a resistance strain gauge, 4, a lead wire, 5, a high-pressure cavity, 6, a low-pressure cavity, 7, a flow guide pipe, 8, a stepped hole, 9, a sealing piece, 10, a sliding piece, 11, a compression spring, 12, sealing oil, 13, an air hole, 14, a flange, 15, a bolt, 16 and a sealing gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a flat pressure sensor is disclosed, as shown in FIG. 1 and FIG. 2, an elastic substrate 2 is arranged inside a housing 1, a resistance strain gauge 3 is arranged on the upper surface of the elastic substrate 2, leads 4 are arranged at two ends of the resistance strain gauge 3, the interior of the housing 1 is divided into a high pressure chamber 5 and a low pressure chamber 6 by the elastic substrate 2, the high pressure chamber 5 is arranged below the low pressure chamber 6, a flow guide pipe 7 is arranged at the bottom of the housing 1, a stepped hole 8 is arranged inside the flow guide pipe 7, a sealing member 9 is slidably connected to the upper side inside the stepped hole 8, a sliding member 10 is slidably connected inside the stepped hole 8, the sealing member 9 and the stepped hole 8 as well as the sliding member 10 and the stepped hole 8 are in sliding and sealing connection, when in a low pressure state, the sliding member 10 slides along the stepped hole 8, and simultaneously cleans a residual measured medium on the inner wall of the stepped hole 8, the lowest end of the sliding member, and the height of the sliding part 10 is greater than the distance between the lowest end of the sealing part 9 and the small hole of the stepped hole 8, so that the sliding part 10 can completely clean the residual measured medium in the stepped hole 8, and the sliding part 10 is positioned in the middle of the large hole of the stepped hole 8, so that the sliding part 10 can slide along the large hole of the stepped hole 8 under the action of the thermal expansion pressure of the sealing oil 12 or the pressure of the measured medium.

As shown in fig. 1 and 3, the sliding member 10 is connected to the sealing member 9 through a compression spring 11, and a sealing oil 12 is disposed between the sealing member 9 and the elastic substrate 2, an air hole 13 is formed at the top of the casing 1, and the air hole 13 is communicated with the low-pressure chamber 6, a flange 14 is disposed at the outer side of the casing 1, and a bolt 15 penetrates through the flange 14, the bolt 15 is distributed in an annular array shape with the center line of the casing 1 as the center, a plurality of bolts 15 are matched and fixed, so that the casing 1 and the container are fixed more tightly, a sealing gasket 16 is disposed at the lower side of the casing 1, and the sealing gasket 16 is disposed at the outer side of the flow guide pipe 7, the sealing gasket 16 is in an annular shape, the center line of the sealing gasket 16 and the center line of.

The working principle is as follows: when the flat pressure sensor is used, firstly, the flow guide pipe 7 is embedded into the opening of the container, the bolt 15 is rotated, the bolt 15 penetrates through the flange 14 to be in threaded connection with the screw hole on the surface of the container, at the moment, the shell 1 and the surface of the container are matched with each other to extrude the sealing gasket 16, so that the shell 1 and the container are in sealed connection, two sides of the resistance strain gauge 3 are connected with an external power supply through the lead 4, a measured medium in the container extrudes the sliding part 10 under the action of pressure, the sliding part 10 slides along the small hole of the stepped hole 8, meanwhile, the sliding part 10 pushes the sealing part 9 to slide along the large hole of the stepped hole 8 through the compression spring 11, so that the sealing part 9 extrudes the elastic substrate 2 through the sealing oil 12, the elastic substrate 2 is stressed to generate deformation, and simultaneously, the resistance strain gauge 3 on the upper surface of the elastic substrate 2 is driven to, the low-pressure cavity 6 above the elastic substrate 2 is communicated with the outside through the air holes 13, the phenomenon that gas in the low-pressure cavity 6 is compressed is avoided, the measurement precision is influenced, the air holes 13 prevent foreign matters from entering the interior of the low-pressure cavity 6, when a measured medium leaves the stepped hole 8, the compression spring 11 pushes the sliding piece 10 to reset, meanwhile, the sliding piece 10 pushes the residual measured medium on the inner wall of the stepped hole 8 to separate from the stepped hole 8, the problem that the measured medium cannot volatilize in part of the measured medium is dried and solidified on the inner wall of the stepped hole 8 to influence the sliding smoothness of a pressed piece and cause reduction of the measurement precision is solved, the sealing oil 12 plays a role in transferring pressure, the problem that the elastic substrate 2 is corroded by the measured medium and deformation is influenced is solved, and all work is finished, and the content which is not described in detail in the specification belongs to the prior art known.

The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A flat pressure sensor comprising a housing (1), characterized in that: the inner side of the shell (1) is provided with an elastic substrate (2), the upper surface of the elastic substrate (2) is provided with a resistance strain gauge (3), both ends of the resistance strain gauge (3) are provided with leads (4), the interior of the shell (1) is divided into a high-pressure cavity (5) and a low-pressure cavity (6) through the elastic substrate (2), the high-pressure cavity (5) is arranged below the low-pressure cavity (6), the bottom of the shell (1) is provided with a flow guide pipe (7), a stepped hole (8) is formed in the flow guide pipe (7), the upper side of the interior of the stepped hole (8) is connected with a sealing element (9) in a sliding manner, a sliding element (10) is connected with the interior of the stepped hole (8) in a sliding manner, the sliding element (10) is connected with the sealing element (9) through a compression spring (11), and sealing oil (12) is arranged, bleeder vent (13) have been seted up at casing (1) top, and bleeder vent (13) are linked together with low pressure chamber (6), casing (1) outside is provided with flange (14), and has run through bolt (15) on flange (14), casing (1) downside is provided with sealed pad (16), and sealed pad (16) set up in honeycomb duct (7) outside.

2. A flat pressure sensor as claimed in claim 1, wherein: the sealing piece (9) is connected with the stepped hole (8) in a sliding and sealing mode, and the sliding piece (10) is connected with the stepped hole (8) in a sliding and sealing mode.

3. A flat pressure sensor as claimed in claim 1, wherein: the lowest end of the sliding piece (10) and the lowest end of the stepped hole (8) are located on the same horizontal plane, and the height of the sliding piece (10) is larger than the distance between the lowest end of the sealing piece (9) and the small hole of the stepped hole (8).

4. A flat pressure sensor as claimed in claim 1, wherein: the sliding piece (10) is positioned in the middle of a large hole of the stepped hole (8).

5. A flat pressure sensor as claimed in claim 1, wherein: the bolts (15) are distributed in an annular array shape by taking the center line of the shell (1) as the center.

6. A flat pressure sensor as claimed in claim 1, wherein: the sealing gasket (16) is annular, and the central line of the sealing gasket (16) and the central line of the flow guide pipe (7) are positioned on the same vertical line.