CN219142091U

CN219142091U - Structure of water pressure-to-air pressure sensor

Info

Publication number: CN219142091U
Application number: CN202223613548.2U
Authority: CN
Inventors: 王永庆; 王兴文
Original assignee: Shenzhen Kangxinyuan Intelligent Equipment Co ltd
Current assignee: Shenzhen Kangxinyuan Intelligent Equipment Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-06
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a water pressure-to-air pressure sensor structure, which comprises a main body internally provided with a cavity, wherein the main body comprises an inserting port arranged at the top and a PCB (printed circuit board) arranged at the bottom, and the cavity is positioned between the inserting port and the PCB; the cavity comprises a water cavity arranged above and a gas cavity arranged below, and the water cavity is isolated from the gas cavity through an elastic sealing cover; a supporting piece is arranged on one side of the PCB, which is positioned in the cavity, the supporting piece and the elastic sealing cover form a sealed gas cavity, and a pressure sensor connected with the PCB is arranged in the gas cavity; through setting up sealed isolated water cavity of elastic sealing lid and gas chamber in the main part, and set up pressure sensor in gas chamber for water pressure converts into and measures the gas pressure in the gas chamber, and further is equipped with 0 type circle and seals the guard action to the sensor to the air inlet of pressure sensor department, convenient and practical.

Description

Structure of water pressure-to-air pressure sensor

Technical Field

The utility model relates to the technical field of pressure sensors, in particular to a structure of a water pressure-to-air pressure sensor.

Background

The pressure sensor (Pressure Transducer) is a device or apparatus that senses a pressure signal and converts the pressure signal to a usable output electrical signal according to a certain law. Pressure sensors are generally composed of a pressure sensitive element and a signal processing unit. Pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors, according to the type of test pressure. The pressure sensor is the most commonly used sensor in industrial practice, is widely applied to various industrial self-control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent building, production self-control, aerospace, military industry, petrochemical industry, oil well, electric power, ships, machine tools, pipelines and the like.

In the prior art, the device for measuring the water pressure to the air pressure is generally complex in structure and high in manufacturing cost, and lacks a protection mechanism and a calibration mechanism, so that a new water pressure to air pressure sensor is needed to solve the defects in the prior art.

Disclosure of Invention

Aiming at the defects in the technology, the utility model provides a water pressure-to-air pressure sensor structure, which comprises a main body with a cavity, wherein the main body comprises an inserting port arranged at the top and a PCB (printed circuit board) arranged at the bottom, and the cavity is positioned between the inserting port and the PCB; the cavity comprises a water cavity arranged above and a gas cavity arranged below, and the water cavity is isolated from the gas cavity through an elastic sealing cover; the PCB is located one side of the cavity and is provided with a supporting piece, the supporting piece and the elastic sealing cover form a sealed gas cavity, and a pressure sensor connected with the PCB is arranged in the gas cavity.

In one embodiment, the gas cavity comprises a first gas cavity formed by enclosing the supporting piece and the elastic sealing cover and a second gas cavity formed by enclosing the supporting frame and the PCB, and the first gas cavity is communicated with the second gas cavity through a gas inlet.

In one embodiment, the pressure sensor is disposed in the second gas chamber, and the sensing end of the pressure sensor is opposite to the gas inlet.

In one embodiment, the support frame is located in the gas cavity and provided with a partition board for isolating the first gas cavity and the second gas cavity, and the air inlet is formed in the middle of the partition board.

In one embodiment, the first O-ring is arranged in front of the bottom of the support frame, and the first 0-ring surrounds

The bottom of the supporting frame is provided; and the first 0-shaped ring is controlled by the PCB to be tightened, so that the air inlet is closed.

In one embodiment, a pressure spring is arranged in the first gas cavity, one end of the pressure spring is connected with the side wall of the supporting frame, the other end of the pressure spring is connected with the elastic sealing cover, and when the elastic sealing cover is in a natural stretching state, the pressure spring is in a natural stretching state.

In one embodiment, the connector comprises a card interface and a quick-plug interface, wherein the card interface is connected with the plug interface, a protruding limiting part extending along the circumferential direction of the plug interface is connected with the card interface, and the quick-plug interface is detachably connected with the card interface and in interference fit with the protruding limiting part.

In one embodiment, a second 0-shaped ring is arranged in the plug interface, and the quick plug interface is in abutting fit with the second 0-shaped ring when being plugged into the plug interface.

In one embodiment, the bottom of the main body is provided with a threaded hole, and the PCB is mounted at the bottom of the main body in a matched manner with the threaded hole through a screw.

In one embodiment, the water cavity is connected with the plug interface through an L-shaped channel, so that a structure is formed that the central axis of the plug interface is perpendicular to the central axis of the water cavity.

The beneficial effects of the utility model are as follows: compared with the prior art, the water pressure-to-air pressure sensor structure provided by the utility model comprises a main body with a cavity, wherein the main body comprises an inserting port arranged at the top and a PCB (printed circuit board) arranged at the bottom, and the cavity is arranged between the inserting port and the PCB; the cavity comprises a water cavity arranged above and a gas cavity arranged below, and the water cavity is isolated from the gas cavity through an elastic sealing cover; a supporting piece is arranged on one side of the PCB, which is positioned in the cavity, the supporting piece and the elastic sealing cover form a sealed gas cavity, and a pressure sensor connected with the PCB is arranged in the gas cavity; through setting up sealed isolated water cavity of elastic sealing lid and gas chamber in the main part, and set up pressure sensor in gas chamber for water pressure converts into and measures the gas pressure in the gas chamber, and further is equipped with O type circle and seals the air inlet of pressure sensor department and realize the guard action to the sensor, convenient and practical.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of another embodiment of the present utility model.

Detailed Description

In order to more clearly illustrate the utility model, the utility model is further described below with reference to the accompanying drawings.

Technical solutions in the embodiments of the present application will be clearly and comprehensively described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or the inclusion of a number of indicated features. Thus, a feature defining "a first" or "a second" may include, either explicitly or implicitly, one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more unless explicitly defined otherwise.

In the application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as exemplary is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed herein.

Referring to fig. 1-2, a structure of a hydraulic-to-pneumatic pressure sensor 4 of the present utility model includes a main body 1 with a cavity therein, the main body 1 includes an interface 16 at the top and a PCB 3 at the bottom, and the cavity is located between the interface 16 and the PCB 3; the cavity comprises a water cavity 14 arranged above and a gas cavity 10 arranged below, and the water cavity 14 is isolated from the gas cavity 10 through an elastic sealing cover 5; a supporting piece 2 is arranged on one side of the PCB 3 positioned in the cavity, the supporting piece 2 and the elastic sealing cover 5 form a sealed gas cavity 10, and a pressure sensor 4 connected with the PCB 3 is arranged in the gas cavity 10; preferably, the elastic sealing cover 5 is a silica gel sealing cover, and the water cavity 14 and the gas cavity 10 are isolated by the silica gel sealing cover; the PP plastic pipe waterway is connected with the water cavity 14 from the plug-in port 16 to provide water pressure, at the moment, the water can impact the silica gel sealing cover, and the deformation of the silica gel sealing cover can squeeze the gas in the gas cavity 10 to generate air pressure, so that the air pressure is detected by the pressure sensor 4 on the PCB 3 to carry out measurement.

In a preferred embodiment, the air pressure chamber volume change ΔV is equal to the pressure change ΔP. Setting the maximum pressure measurement of the pressure sensor 4 to 11 atmospheres, the Δv air space is reduced by 11 times. In order to optimize the material usage amount, the volume of the pressure cavity is designed to be 11 times of that of the pressure sensor 4.

Preferably, the pressure sensor 4 is soldered on the PCB board 3 to the main system via etched copper conductors. Because the pressure sensor 4 is 4-6 binding posts, the external connecting wires can be reduced by directly welding the pressure sensor on the PCB 3.

In one embodiment, the gas cavity 10 comprises a first gas cavity 6 formed by enclosing the support 2 and the elastic sealing cover 5 and a second gas cavity 7 formed by enclosing the support frame and the PCB 3, wherein the first gas cavity 6 is communicated with the second gas cavity 7 through the gas inlet 11; two gas cavities are isolated, and the gas cavities are communicated through the gas inlet 11, so that the sensor is prevented from being damaged due to the fact that the pressure directly impacts the pressure sensor 4 while the pressure change is ensured to be measured.

In one embodiment, the pressure sensor 4 is arranged in the second gas cavity 7, and the sensing end of the pressure sensor 4 faces the gas inlet 11; the accuracy of gas measurement can be ensured against the gas inlet 11.

In one embodiment, the supporting frame is provided with a partition plate 12 in the gas cavity for isolating the first gas cavity 6 and the second gas cavity 7, and an air inlet 11 is arranged in the middle of the partition plate 12; the diaphragm 12 can provide a cushioning effect against sudden air pressure shocks.

In one embodiment, a first 0-shaped ring 8 is arranged in front of the bottom of the support frame, and the first 0-shaped ring 8 is arranged around the bottom of the support frame; the first 0-shaped ring 8 is controlled by the PCB 3 to be tightened, and the air inlet 11 is closed; when the first 0-shaped ring 8 is controlled by the PCB 3 to be tightened, the partition plates 12 are close to each other to close the air inlet 11; the pressure detected by the pressure sensor 4 exceeds a set value, and the sensor silica gel sealing ring can seal the air inlet 11 of the pressure sensor 4 to realize a protection function.

Preferably, the connection of the inner support frame and the PCB 3 is sealed by a first 0-shaped ring 8.

In one embodiment, a pressure spring 9 is arranged in the first gas cavity 6, one end of the pressure spring 9 is connected with the side wall of the support frame, the other end of the pressure spring 9 is connected with the elastic sealing cover 5, and when the elastic sealing cover 5 is in a natural stretching state, the pressure spring 9 is in a natural stretching state; the pressure spring 9 is arranged in the gas cavity, so that the silica gel sealing cover is supported to reset in time when the water pressure is reduced.

In one embodiment, the connector comprises a card interface 17 and a quick connector interface 18, wherein the card interface 17 is connected with the connector interface 16, a protruding limiting part 19 extending along the circumferential direction of the connector interface 16 is connected, and the quick connector interface 18 is detachably connected with the card interface 17 and is in interference fit with the protruding limiting part 19.

In one embodiment, the second 0-shaped ring 15 is disposed in the socket 16, and the quick connector 18 is in abutting engagement with the second 0-shaped ring 15 when inserted into the socket 16.

In one embodiment, the bottom of the main body 1 is provided with a threaded hole, and the PCB 3 is mounted at the bottom of the main body 1 through the cooperation of the screw 13 and the threaded hole; the connection of the PCB 3 and the pressure sensor 4 is fixed by four screws 13, so that the sealing effect can be ensured.

In another embodiment, the water cavity 14 is connected with the socket 16 through an L-shaped channel 20, and a structure is formed that the central axis of the socket 16 is perpendicular to the central axis of the water cavity 14.

Preferably, the first 0-shaped ring 8 and the second 0-shaped ring 15 are both silicone sealing rings.

In one embodiment, the PCB board 3 is further encapsulated with a temperature sensor, the volume change of the sealing body is utilized to obey the air pressure law, the ambient temperature measured by the temperature sensor can be added to correct to obtain the air pressure value, and the static pressures at two sides of the silica gel sealing cover are equal to obtain the water pressure value.

The utility model has the advantages that:

the water cavity and the gas cavity are isolated by the silica gel sealing cover; the PP plastic pipe waterway is connected with the water cavity from the plug-in port to provide water pressure, at the moment, the water can impact the silica gel sealing cover, and the deformation of the silica gel sealing cover can squeeze the gas in the gas cavity to generate air pressure, so that the air pressure is detected by the pressure sensor on the PCB board to carry out measurement.

The above disclosure is only a few specific embodiments of the present utility model, but the present utility model is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. The structure of the water pressure-to-air pressure sensor is characterized by comprising a main body with a cavity, wherein the main body comprises an inserting port arranged at the top and a PCB (printed circuit board) arranged at the bottom, and the cavity is positioned between the inserting port and the PCB; the cavity comprises a water cavity arranged above and a gas cavity arranged below, and the water cavity is isolated from the gas cavity through an elastic sealing cover; the PCB is located one side of the cavity and is provided with a supporting frame, the supporting frame and the elastic sealing cover form a sealed gas cavity, and a pressure sensor connected with the PCB is arranged in the gas cavity.

2. The structure of a hydraulic to pneumatic pressure sensor of claim 1, wherein the gas chamber comprises a first gas chamber formed by enclosing the support frame and the elastic sealing cover and a second gas chamber formed by enclosing the support frame and the PCB, and the first gas chamber is communicated with the second gas chamber through a gas inlet.

3. The structure of claim 2, wherein the pressure sensor is disposed in the second gas chamber, and the sensing end of the pressure sensor is opposite to the gas inlet.

4. The structure of a hydraulic-to-pneumatic pressure sensor according to claim 2, wherein the support frame is located in the gas chamber and provided with a partition plate for isolating the first gas chamber and the second gas chamber, and the air inlet is formed in the middle of the partition plate.

5. The structure of a hydraulic to pneumatic pressure sensor of claim 2 wherein a first O-ring is positioned in front of the bottom of the support frame, the first O-ring being positioned around the bottom of the support frame; and the first O-shaped ring is controlled by the PCB to be tightened, so that the air inlet is closed.

6. The structure of a hydraulic-to-pneumatic pressure sensor according to claim 2, wherein a compression spring is disposed in the first gas chamber, one end of the compression spring is connected to a side wall of the supporting frame, the other end of the compression spring is connected to the elastic sealing cover, and when the elastic sealing cover is in a natural extension state, the compression spring is in a natural extension state.

7. The structure of a hydraulic to pneumatic pressure sensor according to claim 1, wherein the main body further comprises a clamping interface and a quick-insertion interface, the clamping interface is connected with the insertion interface, a protruding limiting portion extending along the circumferential direction of the insertion interface is connected, and the quick-insertion interface is detachably connected with the clamping interface and in interference fit with the protruding limiting portion.

8. The structure of claim 7, wherein a second O-ring is disposed in the socket, and the quick connector is in abutting engagement with the second O-ring when the quick connector is inserted into the socket.

9. The structure of a hydraulic to pneumatic pressure sensor according to claim 1, wherein the bottom of the main body is provided with a threaded hole, and the PCB board is mounted at the bottom of the main body by being matched with the threaded hole through a screw.

10. The structure of a hydraulic to pneumatic pressure sensor according to claim 1, wherein the water cavity is connected with the plug-in port through an L-shaped channel, and a structure is formed in which a central axis of the plug-in port is perpendicular to a central axis of the water cavity.