CN216012581U - Sensor core body assembly - Google Patents

Abstract

The utility model discloses a sensor core component, which comprises a core component and a pressure signal detection unit, wherein the core component comprises a base and an electric connector, the base comprises a fluid introduction cavity, the fluid introduction cavity comprises a fluid introduction cavity and a communication hole, the fluid introduction cavity is communicated with the communication hole, the pressure signal detection unit is fixedly connected with the base, a pressure signal monitoring part of the pressure signal detection unit corresponds to the communication hole, the pressure signal detection unit is positioned above the fluid introduction cavity, and a cavity opening of the fluid introduction cavity is positioned at the lower end of the fluid introduction cavity.

Description

Sensor core body assembly

Technical Field

The utility model relates to the technical field of sensors, in particular to a sensor core body assembly.

Background

A sensor is an important component of an industrial automation control system, and is used for sensing measured information and converting the measured information into an electrical signal or other output information in a required form according to a certain rule. With the continuous development of scientific technology, the application field of the sensor in daily life is more and more extensive. The sensor core assembly is a core part of the sensor, and how to make the sensor core assembly compact is a problem to be considered by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sensor core assembly, which comprises a core component and a pressure signal detection unit, wherein the core component comprises a base and an electric connector, the base and the electric connector are fixedly connected through a sintered body, the base comprises a fluid introducing cavity, the fluid introducing cavity comprises a fluid introducing cavity and a communication hole, and the fluid introducing cavity is communicated with the communication hole; the pressure signal detection unit is fixedly connected with the base, a pressure signal monitoring part of the pressure signal detection unit corresponds to the communication hole, the pressure signal detection unit is positioned above the fluid introduction cavity, and a cavity opening of the fluid introduction cavity is positioned at the lower end of the fluid introduction cavity.

According to the sensor core body assembly provided by the utility model, the pressure signal monitoring part of the pressure signal detection unit corresponds to the communication hole, and the fluid introducing cavity is communicated with the communication hole, so that the core body component structure of the sensor is compact.

Drawings

FIG. 1: the utility model provides a structural schematic diagram of a sensor;

FIG. 2: FIG. 1 is a schematic structural view of a core assembly;

FIG. 3: FIG. 2 is a schematic structural view of the core component;

FIG. 4: the utility model provides a structural schematic diagram of another core component;

FIG. 5: the utility model provides a schematic structure diagram of another sensor;

FIG. 6: the utility model provides a schematic structure diagram of another sensor;

FIG. 7 is a schematic view of a fixing manner of a core member according to the present invention;

FIG. 8: the utility model provides a schematic diagram of another fixing mode of the core body component;

symbolic illustration in fig. 1-8:

1/1A/1B-sensor;

10-a core assembly;

100/100A-core components;

110-base body/base;

120/120A-fluid introduction chamber;

1201-upper body, 1202-lower body;

121-fluid introduction chamber, 123-communication hole;

122/122A-upper end face;

130/130A-electrical connector/pin;

140-a sintered body;

141-upper end face;

200-a pressure signal detection unit;

210-a pressure sensing core;

211-pressure signal monitoring section;

212-a lead;

300/300A-temperature signal detection unit;

310-temperature detection chip;

320-a thermistor;

330-sealing sleeve;

400-a signal processing unit;

410-circuit board, 420-spacer;

500/500A-housing part;

510/510A-body;

511-connecting end, 512-outer edge;

520-a spacer sleeve;

530-a harness jack;

531-wire harness pin;

540-flow path port;

550-lumen;

551-upper chamber, 552-lower chamber;

560-annular sleeve;

570-a connector;

610-a first annular seal;

620 — second annular seal.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are only used for the sake of clarity and convenience in technical solution, and it should be understood that the terms used herein should not limit the scope of the claims; it will also be appreciated that the structural relationships illustrated herein, whether connected, secured, abutted, or otherwise, are intended to encompass both direct and indirect methods, unless specifically noted to embody the novel concepts of its utility.

Fig. 1 is a schematic structural view of a sensor according to the present invention, fig. 2 is a schematic structural view of a core assembly of fig. 1, and fig. 3 is a schematic structural view of a core member of fig. 2.

As shown in fig. 1, 2 and 3. The sensor 1 includes a housing member 500 and a core assembly 10. The core assembly 10 includes a core member 100, a pressure signal detection unit 200, a temperature signal detection unit 300, and a signal processing unit 400.

The core component 100 includes a base 110 and an electrical connector 130, in this embodiment, the base 110 includes a base 110 and a fluid introducing cavity 120 which are separately processed, the base 110 is an annular structure made of a metal material, and the fluid introducing cavity 120, the electrical connector 130 and the base 110 are fixedly connected through a sintered body 140 by using a glass or ceramic dielectric sintering process. The sintered body 140 may serve as an insulating material to perform an electrical isolation function. The fluid introduction chamber 120 is a metal tubular structure disposed in the middle of the annular region. The fluid introduction chamber body 120 includes a central through hole as a fluid introduction chamber 121 and a communication hole 123, the fluid introduction chamber 121 communicates with the communication hole 123, and a chamber opening at a lower end of the fluid introduction chamber 121 is directed to a lower side of the core member 100. The upper end surface 122 of the fluid introduction chamber 120 is higher than the upper end surface 141 of the dielectric sintered body 140; the electrical connector 130 is embodied as a metal electrical connection pin having 2 pieces, and is disposed at the periphery of the annular region. The two ends of the electrical connection pins respectively extend out of the upper surface and the lower surface of the glass medium knot body 140.

The pressure signal detecting unit 200 includes a pressure detecting core 210, and the pressure detecting core 210 is disposed at an upper end of the fluid introduction chamber 120. The pressure detecting core 210 can be fixedly connected with the fluid introducing cavity 120 by gluing or welding, and can seal and block the communicating hole 123, and the pressure signal monitoring part 211 of the pressure detecting core 210 corresponds to the communicating hole 123.

In the present embodiment, the temperature signal detecting element 300 is embodied as a thermistor 320, and the thermistor 320 is fixed by welding to electrically connecting pins respectively protruding from the lower surface of the medium sintered body 140.

The signal processing unit 400 includes a circuit board 410. Circuit board 410 is disposed over core component 100, including 420 a spacer between circuit board 410 and core component 100. The electrical connection pins protruding from the upper surface of the dielectric sintered body 140 are soldered to the circuit board 410 for electrical connection, and the pressure sensing core 210 is electrically connected to the circuit board 410 through the leads 212.

Core assembly 10 is disposed in an internal cavity 550 of housing member 500, and housing member 500 includes a flow path port 540, flow path port 540 being in communication with internal cavity 550.

Fig. 7 is a schematic view showing a fixing manner of a core member according to the present invention, and fig. 8 is a schematic view showing a fixing manner of another core member according to the present invention.

Fig. 7 and 8 are schematic views showing different fixing manners of the core member according to the present invention. In fig. 7, the base body 110 is processed separately from the fluid introduction chamber 120; in fig. 8, the base body 110 and the fluid introducing cavity 120 are integrally formed by the same material, and thus are not described in detail herein.

In the embodiment, the housing member 500 includes a body 510, a non-metallic spacer 520 is disposed in the body 510, and the spacer 520 can prevent the thermistor 320 or the electrical connection pin 130 from electrically contacting the metal body 510. The base body 110 abuts the body 510 through the end of the insulating sleeve 520, and the harness insert 530 abuts the base body 110 through the annular sleeve 560. The upper end of the body 510 is fixed to the wire harness connection socket 530 by means of flanging riveting.

The core assembly 10 divides the inner cavity 550 into an upper cavity 551 and a lower cavity 552, and the first annular seal 610 is axially compressed between the base body 110 and the body 510 such that the upper cavity 551 and the lower cavity 552 are not in communication; the second annular seal 620 is radially compressed between the harness socket 530 and the body 510 such that the upper chamber and the exterior are not in communication.

The sensor 1 is mounted with the pipeline of the flow path system by means of the thread of the connection end 511. The fluid medium enters the lower chamber 552 through the flow path port 540, and then enters the communication hole 123 through the fluid introduction chamber 121, and finally comes into contact with the pressure signal monitoring portion 211 of the pressure detecting core 210. The pressure detecting core 210 and the thermistor 320 detect the changes of the medium pressure and temperature, respectively, and transmit the signals to the circuit board 410 for electric information processing. Finally, the harness pins 531 of the harness socket 530 output sensor signals to the control unit of the flow path system, thereby performing the temperature and pressure detection function of the sensor.

The technical scheme has the beneficial effects that the fluid introducing cavity and the electric connector are fixedly connected with the base body in a glass or ceramic sintering mode, the pressure detection core body is fixedly connected with the fluid introducing cavity, the thermistor is connected with the electric connector, and the pressure signal monitoring part of the pressure signal detection unit corresponds to the communicating hole. The pressure signal detection unit is prevented from being integrally arranged in the fluid introduction cavity, so that the volume of the fluid introduction cavity is reduced, and the core body component of the sensor can be compact in structure;

as a further benefit, only the pressure signal monitoring part of the pressure signal detection unit is in contact with the fluid medium, so that the contact area of the pressure signal detection unit and the fluid medium is reduced, and the corrosion of the detection unit by the possible harmful elements in the fluid medium is reduced;

the integrated core body assembly has the advantages that the integrated core body assembly is formed by the structure, the connection combination has high sealing performance and vibration resistance, the inner cavity is arranged in the core body assembly of the integrated structure, the inner cavity is sealed through the sealing piece, the sealing performance between the lower cavity and the upper cavity is improved, and the working reliability of the sensor is high.

Fig. 4 is a schematic structural view of another core member according to the present invention. As shown in fig. 4. The difference from the foregoing technical solution is that, in this technical solution, the fluid introduction chamber 120A of the core member 100A includes an upper body 1201 and a lower body 1202, and the upper body 1201 and the lower body 1202 are fixed by laser welding. The pressure detecting core 210 is disposed at the upper end of the upper body 1201, the upper end 122A of the lower body 1202 is higher than the upper end 141 of the dielectric sintered body 140, and the upper body 1201 and the detecting core are fixed by gluing or welding.

In the processing process, the fluid may be introduced into the lower body 1202 of the cavity 120A, the electrical connector 130 and the base body by medium sintering to form an integral, and the upper body 1201 and the pressure detection core 210 are fixed by gluing or welding to form an integral; the upper body 1201 and the lower body 1202 are then fixed by laser welding. The technical scheme further improves the matching reliability of the fluid introducing cavity 121 and the pressure signal monitoring part 211, so that the sealing performance between the lower cavity and the upper cavity is improved, the working reliability of the sensor is improved, and the description is omitted.

Fig. 5 is a schematic structural diagram of another sensor according to the present invention. As shown in fig. 5, and with reference to fig. 1, 2 and 3. The difference from the foregoing is that in this solution, the housing part 500A of the sensor 1A includes a body 510A. The core assembly 10 is disposed in the interior cavity 550 of the housing member 500, dividing the interior cavity 550 into an upper cavity 551 and a lower cavity 552. The base body 110 directly abuts against the body 510A, and is fixed to the outer edge 512 where both are fitted by laser welding. The welding also plays a role in sealing, so that the upper cavity 551 is not communicated with the lower cavity 552, and compared with the technical scheme of arranging the first annular sealing member 610, the technical scheme further improves the sealing performance between the upper cavity and the lower cavity, and is not described herein again. After welding, the wire harness socket 530 is connected with the base body 110 in a clamping manner through the connecting piece 570.

Fig. 6 is a schematic structural diagram of another sensor according to the present invention. As shown in fig. 6, and with reference to fig. 1, 2 and 3. The difference from the foregoing technical solution is that, in this technical solution, the temperature signal detection unit 300A of the sensor 1B specifically includes a temperature detection chip 310. The temperature sensing chip 310 may be directly fixed to the core member 100B and electrically connected through the electrical connection pins 130A. The vibration resistance of the sensor is further improved by the technical scheme, and the details are not repeated.

As a further extension of the foregoing technical solution, in consideration that the temperature signal detection unit is disposed in the cavity and may be affected by the impact of the fluid to affect the detection reliability, a sealing sleeve 330 may be added as shown in fig. 6 to isolate the temperature and pressure signal monitoring portion of the temperature detection chip or the thermistor from the fluid medium in the cavity.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (7)

1. A sensor core body assembly is characterized by comprising a core body component and a pressure signal detection unit, wherein the core body component comprises a base and an electric connector, the base and the electric connector are fixedly connected through a sintered body, the base comprises a fluid introducing cavity, the fluid introducing cavity comprises a fluid introducing cavity and a communication hole, and the fluid introducing cavity is communicated with the communication hole;

the pressure signal detection unit is fixedly connected with the base, a pressure signal monitoring part of the pressure signal detection unit corresponds to the communication hole, the pressure signal detection unit is positioned above the fluid introduction cavity, and a cavity opening of the fluid introduction cavity is positioned at the lower end of the fluid introduction cavity.

2. The sensor core assembly of claim 1, further comprising a temperature signal detecting unit located below the fluid introducing cavity, wherein the pressure signal detecting unit comprises a pressure detecting core, wherein the detecting core comprises the pressure signal monitoring part, and the pressure detecting core is fixedly connected with the fluid introducing cavity by welding or gluing.

3. The sensor core assembly of claim 2 wherein the upper end surface of the fluid introduction cavity is raised above the upper end surface of the sintered body.

4. The sensor core assembly of claim 2, wherein the fluid inlet cavity comprises an upper body and a lower body, the upper body and the lower body are fixedly connected by laser welding, and the upper body and the pressure sensing core are fixedly connected by welding or gluing.

5. The sensor core assembly of claim 3 or 4, wherein the base comprises a base body; the base body and the fluid introducing cavity are of an integrated processing structure; or the base body and the introducing cavity are of a split structure, and the fluid introducing cavity, the electric connector and the base body are fixedly connected through a sintered body.

6. The sensor core assembly according to claim 5, wherein the temperature signal detecting unit includes a temperature detecting chip, the temperature detecting chip is fixedly connected to the sintered body directly or indirectly, and the temperature detecting chip is connected to the electrical connector by soldering.

7. The sensor core assembly of claim 5 wherein the temperature signal sensing unit comprises a thermistor, and wherein leads of the thermistor are soldered to the electrical connectors.

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