CN218973704U

CN218973704U - Hydraulic sensor diaphragm fixing device

Info

Publication number: CN218973704U
Application number: CN202222179534.8U
Authority: CN
Inventors: 罗晨阳; 宋文韬; 唐邦洪; 邹雨龙; 李安兴; 杨优军; 何强; 刘力铭; 龚绪; 马建; 程正; 黄贵生; 白东; 蔡晨伟; 叶修波; 郭文静
Original assignee: Guizhou Wujiang Hydropower Development Co ltd Hongjiadu Power Generation Plant; Guizhou Wujiang Hydropower Development Co Ltd
Current assignee: Guizhou Wujiang Hydropower Development Co ltd Hongjiadu Power Generation Plant; Guizhou Wujiang Hydropower Development Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-05-05
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a hydraulic sensor diaphragm fixing device, which comprises a positioning structure, wherein the positioning structure comprises a curved surface shell, a through hole is formed in the center of the curved surface shell, a first placing space and a second placing space are formed in the curved surface shell, a gap is formed between the first placing space and the second placing space, a damping filling structure comprises a first damping layer embedded in the first placing space, a second damping layer embedded in the second placing space, a transition layer embedded in the gap, and the hydraulic sensor only affects the space between the damping layers when being subjected to external force through the embedding relation between the curved surface shell and each damping layer.

Description

Hydraulic sensor diaphragm fixing device

Technical Field

The utility model relates to the field of hydraulic sensors, in particular to a hydraulic sensor diaphragm fixing device.

Background

The hydraulic sensor is a pressure sensor which is most commonly used in industrial practice, is widely applied to various industrial self-control environments, and relates to petroleum pipelines, water conservancy and hydropower, railway traffic, intelligent buildings, production self-control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, hydraulic machinery and other industries.

The measurement accuracy of the traditional hydraulic sensor completely depends on whether the micro-displacement change of the diaphragm is accurate or not, so that the stability of the diaphragm in the working state is extremely important, and the defect of the hydraulic sensor is that the diaphragm is greatly influenced by the external environment, so that the hydraulic sensor does not perform as well when facing to some special working environments, and measured data can be influenced by a plurality of factors such as vibration, collision, natural environment and the like to generate deviation.

Disclosure of Invention

This section is intended to summarize some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments, which may be simplified or omitted from the present section and description abstract and title of the application to avoid obscuring the objects of this section, description abstract and title, and which is not intended to limit the scope of this utility model.

The present utility model has been made in view of the above and/or problems occurring in the prior art.

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the measurement accuracy of the hydraulic sensor is deviated in a special environment, so that the diaphragm fixing part of the hydraulic sensor can resist the interference of external factors, and the diaphragm can accurately receive the pressure given by a liquid medium.

In order to solve the technical problems, the utility model provides the following technical scheme: the hydraulic sensor diaphragm fixing device comprises a positioning structure, a positioning structure and a positioning structure, wherein the positioning structure comprises a curved surface shell, a through hole is formed in the center of the curved surface shell, a first placing space and a second placing space are formed in the curved surface shell, and a gap is formed between the first placing space and the second placing space;

the damping filling structure comprises a first damping layer embedded in the first placing space, a second damping layer embedded in the second placing space and a transition layer embedded in the gap.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: and one end of the curved surface shell is fixedly connected with a bottom plate.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: the silicon piezoresistive sensitive element passes through and enters the through hole, and the silicon piezoresistive sensitive element is fixedly connected with the bottom plate.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: one end of the through hole is provided with a liquid passing channel, one end of the liquid passing channel, which is close to the silicon piezoresistance sensitive element, is provided with a limiting sealing ring, and the other end of the liquid passing channel is provided with a positioning flange.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: and a touch membrane is arranged between the silicon piezoresistance sensitive element and the limiting sealing ring.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: the first shock-absorbing layer comprises an adherence layer and a first embedding layer, and the second shock-absorbing layer comprises a second embedding layer and a force-absorbing layer.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: the second placing space comprises a force dissipating space and a force bearing space, and a fixing ring is fixedly connected in the force bearing space.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: and the fixed ring is fixedly connected with a spring.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: the springs are equal in size and length and are uniformly and equidistantly arranged on the fixed ring.

As a preferred embodiment of the hydraulic sensor diaphragm fixing device according to the present utility model, wherein: an elastic layer is arranged between the stress space and the through hole.

The utility model has the beneficial effects that: through the gomphosis relation between curved surface shell and each buffer layer, let hydraulic sensor when receiving the external pressure of giving, only can influence the space between each buffer layer to when the pipeline of diaphragm is placed in the atress in-process, through the shock attenuation effect of a plurality of buffer layers, external pressure of giving has been very little, and remaining power then wears out through the elastic layer of spring and damping rubber pad material, and liquid medium then passes through the stable pressure of giving the diaphragm of liquid passage, and obtains accurate signal through silicon piezoresistance sensitization piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic three-dimensional view of a hydraulic sensor diaphragm fixing device according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a hydraulic sensor diaphragm fixing device according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an exploded view of a hydraulic sensor diaphragm fixing device according to an embodiment of the present utility model;

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the utility model is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1-2, the present embodiment provides a hydraulic sensor diaphragm fixing device, including a positioning structure 100, where the positioning structure 100 includes a curved surface housing 101 as a frame of the whole device, a through hole 102 is provided in the center of the curved surface housing 101, the curved surface housing 101 is a cylinder with irregular surface, and multiple curved surfaces are provided, so as to form a groove space, where a first placement space 101a at the outermost periphery and a second placement space 101b near the through hole are provided, a gap 101c is provided between the first placement space 101a and the second placement space 101b, and the second placement space 101b further includes a stress-relief space 101b-1 formed by curved surface grooves, and a stress-bearing space 101b-2 at the innermost ring;

the shock-absorbing filling structure 200 is a structure for filling a curved space, and is also a main structure for realizing compression resistance and shock absorption, and comprises a first shock-absorbing layer 201 embedded in the first placing space 101a, a second shock-absorbing layer 202 embedded in the second placing space 101b, and a transition layer 203 embedded in the gap 101 c;

further, the first shock-absorbing layer 201 includes an adhesion layer 201a interposed between the entire inner wall of the hydraulic sensor and the outermost side of the curved surface case 100, and a first embedding layer 201b embedded in the curved surface groove formed by the first placing space 101 a; the second damping layer 202 comprises a second embedded layer 202a embedded in the stress relief space 101b-1 and a stress relief layer 202b embedded in the stress bearing space 101b-2, and an elastic layer 206 is arranged between the stress relief layer 202b and the through hole 102;

in this embodiment, when the external force comes, his force track is:

hydraulic sensor housing- & gt adhesion layer 201 a- & gt curved surface groove- & gt first embedded layer 201 b- & gt curved surface groove- & gt transition layer 203- & gt second embedded layer 202 a- & gt curved surface groove- & gt force absorbing layer 202 b- & gt elastic layer 206

Example 2

Referring to fig. 1 to 3, a second embodiment of the present utility model is based on the previous embodiment, and is different from the previous embodiment in that: the device comprises a curved surface shell 101, a bottom plate 103, a silicon piezoresistance sensitive element 104, a liquid passing channel 105, a limiting sealing ring 106, a positioning flange 105a, a touch membrane 107, a fixed ring 204, a spring 205, a fixed ring 204 and a fixed ring 204, wherein the bottom plate 103 is fixedly connected to one end of the curved surface shell 101, the edge of the bottom plate 103 is connected with the hydraulic sensor shell, the silicon piezoresistance sensitive element 104 is fixedly connected with the bottom plate 103 through a through hole 102, the liquid passing channel 105 is arranged at the inlet of the top end of the through hole 102, the pressurized liquid passes through the liquid passing channel 105, the other end of the liquid passing channel 105, namely, one end close to the silicon piezoresistance sensitive element 104 is provided with the limiting sealing ring 106, the inlet is also provided with the positioning flange 105a, the threaded connection is formed between the threaded opening of the positioning flange 105a and the curved surface shell 101, the edge of the positioning flange 105a is also connected with the hydraulic sensor shell, the silicon piezoresistance sensitive element 104 and the limiting sealing ring 106 are fixedly arranged at the position, the fixed ring is fixedly limited, one side of the inner wall of a stress space 101b-2 is fixedly connected with the fixed ring 204, the spring 205 is fixedly connected to the fixed ring 205, the spring 205 is uniformly arranged on the fixed ring 204, and the fixed ring is uniformly equidistant;

in this embodiment, it can be seen that the whole fixing device is sealed and fixed in the space formed by the bottom plate 103 and the positioning flange 105a, under the condition of avoiding external interference, when normal pressure measurement is performed, the liquid medium enters the liquid passing channel 105 to reach the position of the touch diaphragm 107, and gives a certain pressure to the touch diaphragm 107 to generate micro displacement, when the touch diaphragm 107 deflects, the lower silicon piezoresistive sensor 104 receives the displacement and pressure signals and accurately transmits the displacement and pressure signals to the pressure measuring device connected with the outside, the touch diaphragm 107 is completely fixed by the upper limiting seal ring 106 and the lower silicon piezoresistive sensor 104, and the whole fixing device is completely fixed by the bottom plate 103 and the positioning flange 105 a;

further, when the external force reaches the damping layer 202b of the stress space 101b-2, the force will be diluted by the spring 205, and thoroughly counteracted by the buffer of the elastic layer 206, one side of the spring 205 is fixed on the fixed ring 204, and one side is connected on the elastic layer 206, and 6 springs 205 are uniformly and equidistantly arranged on the fixed ring 204, so as to ensure that the circumferential direction can be fully covered with the damping effect.

Example 3

Referring to fig. 1 to 3, a third embodiment of the present utility model is based on the previous embodiment, and is different from the previous embodiment in that: the EPP is used as a manufacturing material for each damping layer, so that the damping layer has very strong damping effect and toughness, is quite wide in applicable environment, adopts magnesium-aluminum alloy as the manufacturing material for the curved surface shell, has low density and good damping effect, and has certain electromagnetic interference shielding capability;

when the external force reaches the hydraulic sensor shell, the external force is firstly received and is extruded by the wall attaching layer 201a, the external force is weakened for the first time and is given to the curved surface groove, the curved surface groove generates micro-displacement, and the first embedded layer 201b is extruded, the external force is weakened for the second time and is given to the curved surface groove, the stress at the gap 101c is complex, the width of the transition layer 203 is slightly shorter than that of the curved surface groove above, so the external force firstly comes to the curved surface groove and then is given to the transition layer 203, the transition layer 203 is made of epoxy resin, a layer of PVC colloid is attached to the surface, a certain adhesion and fixation property are realized on the shock absorption layer and the magnesium aluminum alloy curved surface groove which are made of peripheral EPP materials, the transition layer 203 which is softer only generates micro-weakening force action, then the external force is given to the second embedded layer 202a, the third micro-weakening external force is generated, and is given to the curved surface groove, finally the external force is given to the force layer 202b, the fourth weakening is carried out, the rest external force is sent to the elastic layer 206 through the spring 205, one side is made of the elastic layer 206, and the other side is made of the metal pad, and the other side is gradually weakened, and the original shock absorption force is weakened;

further, the limiting sealing ring 106 contacts with the touch membrane 107 and limits the vertical direction of the touch membrane, the elastic layer 206 is the last checkpoint where the external pressure is transmitted to the touch membrane, and when the external force is sent to the elastic layer through the spring, the external force is basically towards zero, so that no micro displacement is generated on the touch membrane 107 at the moment, and the side, close to the touch membrane 107, of the elastic layer 206 belongs to metal solid and limits the touch membrane 107 in the horizontal direction;

further, when the liquid medium enters the liquid passing pipeline 105, the touch diaphragm 107 begins to be formally pressed to generate micro displacement, when the touch diaphragm 107 deflects, the lower silicon piezoresistive sensor 104 receives signals of displacement and pressure and accurately transmits the signals to the externally connected pressure measuring device, the touch diaphragm 107 is completely fixed by the upper limiting sealing ring 106 and the lower silicon piezoresistive sensor 104, and the whole fixing device is completely fixed by the bottom plate 103 and the positioning flange 105 a.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims

1. Hydraulic pressure sensor diaphragm fixing device, its characterized in that: comprising the steps of (a) a step of,

the positioning structure (100) comprises a curved surface shell (101), a through hole (102) is formed in the center of the curved surface shell (101), a first placing space (101 a) and a second placing space (101 b) are formed in the curved surface shell (101), and a gap (101 c) is formed between the first placing space (101 a) and the second placing space (101 b);

a shock absorbing filling structure (200) comprises a first shock absorbing layer (201) embedded in the first placing space (101 a), a second shock absorbing layer (202) embedded in the second placing space (101 b), and a transition layer (203) embedded in the gap (101 c).

2. The hydraulic sensor diaphragm fixation apparatus of claim 1, wherein: one end of the curved surface shell (101) is fixedly connected with a bottom plate (103).

3. The hydraulic sensor diaphragm fixation apparatus of claim 2, wherein: the silicon piezoresistive sensitive element (104) passes through and enters the through hole (102), and the silicon piezoresistive sensitive element (104) is fixedly connected with the bottom plate (103).

4. A hydraulic sensor diaphragm fixation apparatus according to claim 3, wherein: one end of the through hole (102) is provided with a liquid passing channel (105), one end of the liquid passing channel (105) close to the silicon piezoresistance sensitive element (104) is provided with a limit sealing ring (106), and the other end is provided with a positioning flange (105 a).

5. The hydraulic sensor diaphragm fixation apparatus of claim 4, wherein: a touch membrane (107) is arranged between the silicon piezoresistive sensitive element (104) and the limiting sealing ring (106).

6. The hydraulic sensor diaphragm fixation apparatus of claim 1 or 5, wherein: the first shock absorption layer (201) comprises an adhesion layer (201 a) and a first embedding layer (201 b), and the second shock absorption layer (202) comprises a second embedding layer (202 a) and a force dissipation layer (202 b).

7. The hydraulic sensor diaphragm fixation apparatus of claim 6, wherein: the second placing space (101 b) comprises a force dissipating space (101 b-1) and a force bearing space (101 b-2), and a fixing ring (204) is fixedly connected in the force bearing space (101 b-2).

8. The hydraulic sensor diaphragm fixation apparatus of claim 7, wherein: and a spring (205) is fixedly connected to the fixed ring (204).

9. The hydraulic sensor diaphragm fixation apparatus of claim 8, wherein: the springs (205) are equal in size and length and are uniformly and equidistantly arranged on the fixed ring (204).

10. The hydraulic sensor diaphragm fixation apparatus of claim 9, wherein: an elastic layer (206) is arranged between the damping layer (202 b) and the through hole (102).