CN209910882U - Spring type pressure buffering device and pressure sensor - Google Patents

Abstract

An embodiment of the utility model provides a spring pressure buffer and pressure sensor, include: the movable core body, the spring and the lining; the movable core body is cylindrical and is divided into a first body and a second body, and the diameter of the first body is larger than that of the second body; a first channel is arranged in the first main body, and an opening of the first channel is arranged on the end surface of the first main body; the second main body is internally provided with a cavity structure and a second channel, an opening of the cavity structure is arranged on the end surface far away from the first main body, an opening of the second channel is arranged on the side wall of the second main body, and the first channel is communicated with the second channel; the inner liner is provided with a convex structure, a third channel is arranged in the convex structure, and an opening of the third channel is arranged on the end face of the convex structure; one end of the spring is arranged in the cavity structure, and the other end of the spring is sleeved on the bulge structure. The device has simple structure, small volume and light weight.

Description

Spring type pressure buffering device and pressure sensor

Technical Field

The embodiment of the utility model provides a relate to sensor technical field, more specifically relates to a spring pressure buffer and pressure sensor.

Background

A Pressure Transducer 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. A pressure sensor is usually 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 different types of test pressures. Pressure sensors are one of the most widely used. The traditional pressure sensor is mainly based on a mechanical structure type device, and indicates pressure by deformation of an elastic element, but the structure is large in size and heavy in weight, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have come to be developed. Its advantages are small size, light weight, high accuracy and high temp. Particularly, with the development of MEMS technology, the semiconductor sensor is miniaturized, and has low power consumption and high reliability.

Pressure pulses in the hydraulic line lead to a reduced reliability and a reduced service life of the pressure measuring device, but currently there is no effective pressure pulse damping device in the pressure sensor, and therefore there is a continuing need to provide a pressure damping device for pressure sensors.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a overcome above-mentioned problem or solve spring pressure buffer and pressure sensor of above-mentioned problem at least partially.

First aspect the embodiment of the utility model provides a spring pressure buffer, include: the movable core body, the spring and the lining; wherein,

the main body of the movable core is cylindrical and is divided into a first main body and a second main body, and the diameter of the first main body is larger than that of the second main body;

a first channel is arranged in the first main body, and an opening of the first channel is arranged on the end surface of the first main body; the second main body is internally provided with a cavity structure and a second channel, an opening of the cavity structure is arranged on the end face far away from the first main body, an opening of the second channel is arranged on the side wall of the second main body, and the first channel is communicated with the second channel;

the lining is provided with a convex structure, a third channel is arranged in the convex structure, and an opening of the third channel is arranged on the end face of the convex structure;

one end of the spring is arranged in the cavity structure, and the other end of the spring is sleeved on the protrusion structure.

Further, the first channel is a through hole penetrating through the first body, and an axis of the first channel coincides with an axis of the movable core.

Further, the second channel is a through hole penetrating through the side wall of the second body.

Further, at least one through hole communicated with the cavity structure is arranged on the side wall of the second main body.

On the other hand, the embodiment of the utility model provides a pressure sensor, including pressure core, filler neck and above-mentioned spring pressure buffer; wherein,

the spring type pressure buffering device is arranged between a fluid inlet of the filler neck and the pressure core body, the fluid inlet of the filler neck is communicated with the first channel, and fluid flows into the spring type pressure buffering device through the first channel in the spring type pressure buffering device and flows out of the spring type pressure buffering device through the third channel in the spring type pressure buffering device.

The embodiment of the utility model provides a pair of spring pressure buffer and pressure sensor, wherein contain spring pressure buffer, connect activity core and inside lining through the spring, the activity core will compress spring and begin to move about when hydraulic pulse is used in the activity core, the energy of this in-process pulse pressure obtains releasing, very big fluidic hydraulic pulse that weakens for the fluid that flows out has eliminated hydraulic pulse basically in the inside lining. The device has simple structure, small volume and light weight.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a plan sectional view of a pressure sensor including a spring type pressure buffer device according to an embodiment of the present invention;

FIG. 2 is a perspective cross-sectional view of the pressure sensor of FIG. 1 including a spring-loaded pressure buffer;

reference numerals:

1-a movable core; 2-a spring;

3-lining; 4-a pressure core;

5-a filler neck; 11-a first channel;

12-a cavity structure; 13-a second channel;

31-a bump structure; 32-third channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that 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.

The embodiment of the utility model provides a spring pressure buffer, as shown in fig. 1-2, include: the movable core body 1, the spring 2 and the lining 3; wherein,

the main body of the movable core body 1 is cylindrical, the main body is divided into a first main body and a second main body, and the diameter of the first main body is larger than that of the second main body;

a first channel 11 is arranged in the first main body, and an opening of the first channel is arranged on the end surface of the first main body; the second main body is internally provided with a cavity structure 12 and a second channel 13, an opening of the cavity structure 12 is arranged on the end surface far away from the first main body, an opening of the second channel 13 is arranged on the side wall of the second main body, and the first channel 11 is communicated with the second channel 12;

the lining 3 is provided with a convex structure 31, a third channel 32 is arranged inside the convex structure 31, and an opening of the third channel 32 is arranged on the end face of the convex structure 31;

one end of the spring 2 is arranged in the cavity structure 12, and the other end of the spring 2 is sleeved on the convex structure 31.

The lengths of the first body and the second body in the movable core 1 can be determined by calculation according to actual requirements before the movable core is processed. The movable core 1 may form a gap with the external component between the side walls of the second body. The openings of the second passages 13 are provided on the side walls of the second body, and the fluid can flow into the movable core 1 through the second passages 13 to form gaps with the external components between the side walls of the second body.

Specifically, the fluid to be pressure buffered enters the movable core 1 through the first passage 11, enters the movable core 1 through the second passage 13, forms a gap with an external component between the side walls of the second body, enters the cavity structure 12, and flows into the third passage 32 in the protrusion structure 31 in the cavity structure 12. In the process, when the hydraulic pulse acts on the movable core 1, the movable core 1 compresses the spring 2 to start to move, and in the process, the energy of the pulse pressure is released, namely, the fluid flowing out from the third channel 32 basically eliminates the hydraulic pulse, and the safety of a subsequent detection chip is ensured.

The embodiment of the utility model provides a pair of spring pressure buffer, to move about core and inside lining through the spring and connect, the activity core will compress spring and begin to move about when hydraulic pulse is used in the activity core, and the energy of this in-process pulse pressure is released, the fluidic hydraulic pulse of very big weakening for the fluid that flows out in the inside lining has basically eliminated hydraulic pulse. The device has simple structure, small volume and light weight.

In the above embodiment, the first passage 11 is a through hole penetrating through the first body, and the axis of the first passage 11 coincides with the axis of the movable core 1.

Specifically, the diameter of the first passage 11 may be determined by calculation according to actual requirements before the movable core 1 is machined. The fluid flows into the movable core 1 through the first channel 11 and into the second channel 13.

In the above embodiment, the second channel 13 is a through hole penetrating the sidewall of the second body.

Specifically, the diameter of the second passage 13 may be determined by calculation according to actual requirements before the movable core 1 is machined. Fluid flows into the threaded connection through the second passage 12.

Further, at least one through hole communicated with the cavity structure is arranged on the side wall of the second main body.

In particular, when the spring 2 is compressed and the opening of the cavity structure 12 is closed against the liner 2, the fluid can enter the cavity through at least one through hole provided in the side wall of the second body in communication with the cavity structure 12 to achieve the communication.

The embodiment of the utility model provides a pressure sensor, refer to fig. 1-fig. 2 again, including pressure core 3, filler pipe 4 and above-mentioned spring pressure buffer; wherein,

the spring type pressure buffering device is arranged between a fluid inlet of the filler neck 4 and the pressure core 4, a fluid inlet of the filler neck 5 is communicated with the first channel 11, fluid flows into the spring type pressure buffering device through the first channel 11 in the spring type pressure buffering device, and then flows out of the spring type pressure buffering device through the third channel 32 in the spring type pressure buffering device.

Specifically, the spring type pressure buffering device is arranged in the filler neck 5, fluid needing pressure buffering enters the pressure sensor through a fluid inlet of the filler neck 5, enters the movable core 1 through the first channel 11, enters the movable core 1 through the second channel 13, can form a gap with an external component between the side wall of the second main body, enters the cavity structure 12, and flows into the third channel 32 in the protrusion structure 31 in the cavity structure 12. In the process, when a hydraulic pulse acts on the movable core 1, the movable core 1 compresses the spring 2 to start to move, and the energy of the pulse pressure is released in the process, namely, the fluid flowing out from the third channel 32 basically eliminates the hydraulic pulse, and the safety of the pressure core 4 is ensured.

The embodiment of the utility model provides a pair of pressure sensor, wherein contain spring pressure buffer, connect activity core and inside lining through the spring, the activity core will compress spring and begin to move about when hydraulic pulse acts on the activity core, and the energy of this in-process pulse pressure obtains releasing, the fluidic hydraulic pulse of very big weakening for hydraulic pulse has been eliminated basically to the fluid that flows out in the inside lining. The device has simple structure, small volume and light weight.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (5)

1. A spring type pressure buffering device, comprising: the movable core body, the spring and the lining; wherein,

the main body of the movable core is cylindrical and is divided into a first main body and a second main body, and the diameter of the first main body is larger than that of the second main body;

a first channel is arranged in the first main body, and an opening of the first channel is arranged on the end surface of the first main body; the second main body is internally provided with a cavity structure and a second channel, an opening of the cavity structure is arranged on the end face far away from the first main body, an opening of the second channel is arranged on the side wall of the second main body, and the first channel is communicated with the second channel;

the lining is provided with a convex structure, a third channel is arranged in the convex structure, and an opening of the third channel is arranged on the end face of the convex structure;

one end of the spring is arranged in the cavity structure, and the other end of the spring is sleeved on the protrusion structure.

2. The spring pressure cushioning device of claim 1, wherein the first passage is a through hole that extends through the first body, and an axis of the first passage coincides with the movable core axis.

3. The spring pressure cushioning device of claim 1, wherein the second passage is a through hole that extends through a side wall of the second body.

4. The spring pressure cushioning device of claim 3, wherein at least one through hole is provided in a side wall of the second body in communication with the cavity structure.

5. A pressure sensor, comprising a pressure core, a filler neck and a spring-loaded pressure buffer device as claimed in any one of claims 1 to 4; wherein,

the spring type pressure buffering device is arranged between a fluid inlet of the filler neck and the pressure core body, the fluid inlet of the filler neck is communicated with the first channel, and fluid flows into the spring type pressure buffering device through the first channel in the spring type pressure buffering device and flows out of the spring type pressure buffering device through the third channel in the spring type pressure buffering device.

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