CN211178838U

CN211178838U - Waterproof type pressure sensor

Info

Publication number: CN211178838U
Application number: CN201921702056.6U
Authority: CN
Inventors: 李凤岐; 郑奇
Original assignee: Tianjin Yuntengruicheng Technology Co ltd
Current assignee: Tianjin Yuntengruicheng Technology Co ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-08-04
Anticipated expiration: 2029-10-11

Abstract

The utility model provides a waterproof type pressure sensor belongs to pressure sensor technical field, and this pressure sensor includes base member, sensor module and shell subassembly. The during operation, external pressure exerts pressure to the barrier diaphragm, the barrier diaphragm warp, silicon oil to in the stock solution chamber compresses, silicon oil in the stock solution chamber transmits pressure to the pressure sensor body on, survey external pressure, the device seals the upper portion of base member through casing and apron, seal the lower part of base member through casing and barrier diaphragm, make base member and sensor body seal completely in the shell subassembly, and then inside the unable casing that gets into of outside water of messenger's shell subassembly, the holistic waterproof nature of sensor has been strengthened, and do not influence the pressure measurement accuracy when guaranteeing water-proof effects.

Description

Waterproof type pressure sensor

Technical Field

The utility model relates to a pressure sensor technical field particularly, relates to a waterproof type pressure sensor.

Background

A pressure sensor is a device or apparatus that senses a pressure signal and converts the pressure signal into a usable output electrical signal according to a certain rule. In some cases, the pressure sensor needs to be used in water, and although the existing pressure sensor has a certain waterproof effect through some sealing structures, the accuracy of the measurement of the sensor is reduced if the existing pressure sensor is too sealed, and the waterproof effect is reduced if the existing pressure sensor is not sealed enough, so that the water inlet inside the sensor is damaged.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the utility model provides a waterproof type pressure sensor aims at improving the sensor too sealed, leads to sensor testing result accuracy to reduce, or sealed not enough, the impaired problem of intaking easily of sensor inside.

The utility model discloses a realize like this: a waterproof pressure sensor comprises

The liquid storage device comprises a base body, wherein a first mounting groove is formed in the top of the base body, a second mounting groove is formed in the middle of the base body, a third mounting groove is formed in the bottom of the base body, an isolation diaphragm is mounted in the third mounting groove, a liquid storage chamber is arranged on the base body and is arranged between the third mounting groove and the second mounting groove, and the first mounting groove, the second mounting groove, the liquid storage chamber and the third mounting groove are sequentially communicated;

the sensor assembly comprises a sensor body and a fixing plate, the sensor body is provided with a wire, the fixing plate is provided with a first through hole, the wire penetrates through the first through hole, the sensor body is fixedly installed on the fixing plate, the fixing plate is installed in the first installation groove, the sensor body is installed in the second installation groove, and the liquid storage chamber is filled with silicone oil;

the shell assembly comprises a shell and a cover plate, the top and the bottom of the shell are both provided with openings, the base body is installed inside the shell, and the cover plate is connected with the top of the shell.

In an embodiment of the present invention, the second mounting groove is provided with a sealing layer between the sensor bodies, and the sealing layer is filled with a sealant.

In an embodiment of the present invention, the wire and the first through hole are sealed by a sealant.

In an embodiment of the present invention, the bottom opening of the housing is connected to a grid net.

The utility model discloses an in one embodiment, the upper and lower both sides of isolation diaphragm all are provided with the sealing washer, one of them the sealing washer sets up isolation diaphragm with between the top of third mounting groove, another the sealing washer sets up isolation diaphragm with between the casing.

In an embodiment of the present invention, the bottom of the cover plate is provided with a first sealing pad, and the first sealing pad is glued on the cover plate.

The utility model discloses an in an embodiment, the both sides of apron all are provided with the mounting hole, the top both sides of base member all are provided with the screw hole, the screw hole with install the bolt in the mounting hole.

The utility model discloses an in an embodiment, the bottom of fixed plate is provided with two stoppers, two spacing holes have been seted up to the bottom of first mounting groove, the stopper is installed spacing downthehole.

In an embodiment of the present invention, the bottom of the fixing plate is provided with a second sealing gasket.

The utility model discloses an in an embodiment, set up on the second sealing gasket with the second through-hole of stopper looks adaptation.

The utility model has the advantages that: the waterproof pressure sensor obtained by the design of the utility model fixes the sensor body through the base body, the upper part of the basal body is fixed and sealed through the shell and the cover plate, the third mounting groove is internally provided with an isolation diaphragm in a sealing way, the liquid storage chamber is filled with silicon oil, when the device works, external pressure exerts pressure on the isolation diaphragm, the isolation diaphragm deforms, compressing the silicon oil in the liquid storage chamber, transmitting the pressure to the pressure sensor body by the silicon oil in the liquid storage chamber, measuring the external pressure, the device seals the upper part of the basal body through the shell and the cover plate, seals the lower part of the basal body through the shell and the isolation diaphragm, leads the basal body and the sensor body to be completely sealed in the shell component, and then make the outside water of shell subassembly can't get into inside the casing, strengthened the holistic waterproof nature of sensor to do not influence the pressure measurement accuracy when guaranteeing water-proof effects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of an internal structure provided in an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a base body according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a sensor assembly according to an embodiment of the present invention;

fig. 4 is an enlarged view of a portion of a sensor assembly provided by an embodiment of the present invention;

FIG. 5 is an enlarged view of the position A of FIG. 1 according to the present invention;

fig. 6 is a schematic structural diagram of the housing assembly according to the embodiment of the present invention.

In the figure: 110-a substrate; 120-a third mounting groove; 130-a second mounting groove; 131-a sealing layer; 140-a reservoir; 150-a first mounting groove; 160-threaded hole; 170-limiting holes; 200-a housing assembly; 210-a housing; 211-a grid mesh; 220-a cover plate; 221-mounting holes; 230-a first gasket; 300-a sensor assembly; 310-a sensor body; 311-conductive lines; 320-a fixed plate; 321-a first via; 322-a stop block; 330-a second gasket; 400-sealing ring; 500-isolating the diaphragm.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are 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.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1, the present invention provides a technical solution: a waterproof pressure sensor includes a base 110, a sensor assembly 300, and a housing assembly 200.

Referring to fig. 2, a first mounting groove 150 is formed at the top of the base 110, a second mounting groove 130 is formed at the middle of the base 110, a third mounting groove 120 is formed at the bottom of the base 110, an isolation diaphragm 500 is mounted in the third mounting groove 120, a liquid storage chamber 140 is formed on the base 110, the liquid storage chamber 140 is disposed between the third mounting groove 120 and the second mounting groove 130, and the first mounting groove 150, the second mounting groove 130, the liquid storage chamber 140 and the third mounting groove 120 are sequentially communicated with each other.

Referring to fig. 3 and 4, the sensor assembly 300 includes a sensor body 310 and a fixing plate 320, the sensor body 310 is provided with a conductive wire 311, the fixing plate 320 is provided with a first through hole 321, the conductive wire 311 penetrates through the first through hole 321, the conductive wire 311 and the first through hole 321 are sealed by sealant, water is prevented from entering the first through hole 321, the sensor body 310 is damaged, the sensor body 310 is connected to the fixing plate 320, the fixing plate 320 is installed in the first installation groove 150, the bottom of the fixing plate 320 is provided with two limiting blocks 322, the bottom of the first installation groove 150 is provided with two limiting holes 170, the limiting blocks 322 are installed in the limiting holes 170, the fixing plate 320 and the sensor body 310 are prevented from changing positions on the base 110 by the cooperation of the limiting blocks 322 and the limiting holes 170, the bottom of the fixing plate 320 is provided with a second sealing gasket 330, the arrangement of the second sealing gasket 330 increases the waterproof effect of, the second through hole matched with the limiting block 322 is formed in the second sealing gasket 330, the sensor body 310 is installed in the second installation groove 130, silicone oil is filled in the liquid storage chamber 140, the sensor body 310 cannot be damaged by the silicone oil, and pressure can be conducted. The sensor body 310 is fixed by the base 110, the fixing plate 320 is installed in the first installation groove 150, and the sensor body 310 is installed in the second installation groove 130. During operation, external pressure exerts pressure on isolation diaphragm 500, and isolation diaphragm 500 warp, compresses the silicone oil in reservoir 140, and the silicone oil in reservoir 140 transmits pressure to pressure sensor body 310.

In specific setting, referring to fig. 5, a sealing layer 131 is disposed between the second mounting groove 130 and the sensor body 310, and the sealing layer 131 is filled with a sealant. The sealing layer 131 is arranged to enable the sensor body 310 to be installed in the second installation groove 130 in a sealing mode, and therefore waterproofness is improved.

Referring to fig. 6, the housing assembly 200 includes a housing 210 and a cover plate 220, a first gasket 230 is disposed at the bottom of the cover plate 220, both the top and the bottom of the housing 210 are open, the base 110 is installed inside the housing 210, both sides of the cover plate 220 are provided with mounting holes 221, both sides of the top of the base 110 are provided with threaded holes 160, bolts are installed in the threaded holes 160 and the mounting holes 221, the cover plate 220 is connected to the top of the housing 210 through the bolts, the first gasket 230 is bonded to the cover plate 220, the mounting positions of the cover plate 220 and the housing 210 are sealed through the first gasket 230, and a waterproof effect of the housing assembly 200 is improved.

In a specific arrangement, a grille 211 is attached to the bottom opening of the housing 210. The setting of grid net 211 protects isolation diaphragm 500, blocks the foreign matter, prevents that the foreign matter from scraping isolation diaphragm 500, makes pressure sensor inside intake, causes the harm to pressure sensor.

In a specific arrangement, the upper and lower sides of the isolation diaphragm 500 are provided with the sealing rings 440, one of the sealing rings 440 is disposed between the isolation diaphragm 500 and the top of the third mounting groove 120, and the other sealing ring 440 is disposed between the isolation diaphragm 500 and the housing 210. The two sealing rings 440 are arranged to seal the isolation diaphragm 500 and the base 110, so that the waterproof effect inside the base 110 is improved.

The working principle is as follows: this sensor fixes sensor body 310 through base member 110, fix and seal base member 110 upper portion through casing 210 and apron 220, isolation diaphragm 500 is installed to third mounting groove 120 internal seal, stock solution room 140 intussuseption is filled with silicon oil, in operation, external pressure exerts pressure to isolation diaphragm 500, isolation diaphragm 500 warp, compress the silicon oil in stock solution room 140, the silicon oil in stock solution room 140 transmits pressure to pressure sensor body 310 on, survey external pressure.

It should be noted that the specific model specification of the isolation diaphragm 500 needs to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply of the sensor body 310 and its principle will be clear to those skilled in the art and will not be described in detail here.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A waterproof pressure sensor is characterized by comprising

The liquid storage device comprises a base body (110), wherein a first mounting groove (150) is formed in the top of the base body (110), a second mounting groove (130) is formed in the middle of the base body (110), a third mounting groove (120) is formed in the bottom of the base body (110), an isolation diaphragm (500) is mounted in the third mounting groove (120), a liquid storage chamber (140) is formed in the base body (110), the liquid storage chamber (140) is arranged between the third mounting groove (120) and the second mounting groove (130), and the first mounting groove (150), the second mounting groove (130), the liquid storage chamber (140) and the third mounting groove (120) are sequentially communicated;

the sensor assembly (300) comprises a sensor body (310) and a fixing plate (320), wherein the sensor body (310) is provided with a conducting wire (311), the fixing plate (320) is provided with a first through hole (321), the conducting wire (311) penetrates through the first through hole (321), the sensor body (310) is fixedly installed on the fixing plate (320), the fixing plate (320) is installed in the first installation groove (150), the sensor body (310) is installed in the second installation groove (130), and the liquid storage chamber (140) is filled with silicone oil;

the shell assembly (200) comprises a shell (210) and a cover plate (220), wherein the top and the bottom of the shell (210) are both arranged in an open mode, the base body (110) is installed inside the shell (210), and the cover plate (220) is connected with the top of the shell (210).

2. The waterproof pressure sensor according to claim 1, wherein a sealing layer (131) is disposed between the second mounting groove (130) and the sensor body (310), and the sealing layer (131) is filled with a sealant.

3. A waterproof pressure sensor according to claim 1, wherein the lead (311) and the first through hole (321) are sealed by a sealant.

4. A waterproof pressure sensor according to claim 1, wherein a grid mesh (211) is attached to the bottom opening of the housing (210).

5. The waterproof pressure sensor according to claim 1, wherein the isolation diaphragm (500) is provided with sealing rings (400) at upper and lower sides thereof, one of the sealing rings (400) is disposed between the isolation diaphragm (500) and the top of the third mounting groove (120), and the other sealing ring (400) is disposed between the isolation diaphragm (500) and the housing (210).

6. A waterproof pressure sensor according to claim 1, characterized in that a first sealing gasket (230) is arranged at the bottom of the cover plate (220), and the first sealing gasket (230) is glued to the cover plate (220).

7. The waterproof pressure sensor according to claim 1, wherein the cover plate (220) is provided with mounting holes (221) on both sides, the base body (110) is provided with threaded holes (160) on both sides of the top, and bolts are mounted in the threaded holes (160) and the mounting holes (221).

8. The waterproof pressure sensor according to claim 1, wherein two limiting blocks (322) are disposed at the bottom of the fixing plate (320), two limiting holes (170) are disposed at the bottom of the first mounting groove (150), and the limiting blocks (322) are mounted in the limiting holes (170).

9. A waterproof pressure sensor according to claim 8, wherein the bottom of the fixing plate (320) is provided with a second gasket (330).

10. The waterproof pressure sensor according to claim 9, wherein the second gasket (330) is provided with a second through hole adapted to the stopper (322).