CN217155685U - High-airtightness pressure sensor - Google Patents

Abstract

The utility model discloses a high-tightness pressure sensor, which comprises a diaphragm, a piston, a cover plate, a pressing plate, a lower shell, an induction piston, a spring, an upper shell, an induction switch and a plug; the lower shell, the upper shell and the plug are sequentially connected, the lower shell and the upper shell are hollow, and the diaphragm, the piston, the cover plate, the pressure plate, the induction piston, the spring and the induction switch are sequentially arranged in the lower shell and the upper shell; the lower end of the piston is abutted to the lower shell through the diaphragm, the piston is inserted into the cover plate and the pressing plate, the piston can be arranged in the lower shell in a vertically floating mode, the sensing piston is a cylinder body with a U-shaped groove in the inner part, the spring is arranged in the U-shaped groove, the piston can be abutted to the sensing piston when vertically floating, the sensing piston is driven to move up and down, the sensing piston can move to abut against the sensing switch, and the sensing switch is connected with the plug through a wire; the utility model provides a sealed effectual pressure sensor.

Description

High-airtightness pressure sensor

Technical Field

The utility model relates to a sensor technical field specifically is a high leakproofness pressure sensor.

Background

The pressure sensor is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to a plurality of industries such as water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like.

The inventor of the application develops a sensor which is simpler in structure and lower in cost compared with the prior art, and the sensor comprises a plug, a piston rod, a lower shell, an induction piston, a spring, an upper shell, an induction switch and a plug; the lower shell, the upper shell and the plug are sequentially connected, the lower shell and the upper shell are hollow, and the plug, the piston rod, the induction piston, the spring and the induction switch are sequentially arranged in the lower shell and the upper shell; the end cap is provided with an oil hole, the piston rod can be arranged in the lower shell in a vertically floating mode, the induction piston is a cylinder with a U-shaped groove inside, the spring is arranged in the U-shaped groove, the piston rod can abut against the induction piston when floating vertically, so that the induction piston is driven to move up and down, the induction piston can move to abut against the induction switch, and the induction switch is connected with the plug through an electric wire. However, the inventor of the present application finds that, in later work and research, the piston rod is pressurized by leaking oil through the plug, which results in poor sealing effect of the piston rod, and thus the product performance is affected.

In summary, the prior art still lacks a pressure sensor with good sealing effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a pressure sensor that the leakproofness is good.

To achieve the purpose, the embodiment of the present invention provides the following technical solutions:

a high-tightness pressure sensor comprises a diaphragm, a piston, a cover plate, a pressure plate, a lower shell, an induction piston, a spring, an upper shell, an induction switch and a plug; the lower shell, the upper shell and the plug are sequentially connected, the lower shell and the upper shell are hollow, and the diaphragm, the piston, the cover plate, the pressure plate, the induction piston, the spring and the induction switch are sequentially arranged in the lower shell and the upper shell; the lower end of the piston is abutted to the lower shell through the diaphragm, the piston is inserted into the cover plate and the pressing plate, the piston can be arranged in the lower shell in a vertically floating mode, the induction piston is a cylinder with a U-shaped groove in the cylinder, the spring is arranged in the U-shaped groove, the piston can be abutted to the induction piston when vertically floating, so that the induction piston is driven to move up and down, the induction piston can move to abut to the induction switch, and the induction switch is connected with the plug through an electric wire.

Preferably, one end of the pressure plate is provided with a groove, and the diaphragm, the piston and the cover plate can be arranged in the groove. The groove structure can further ensure the sealing effect among the diaphragm, the piston and the cover plate.

Preferably, the piston comprises a piston rod and a piston cap, the piston rod is cylindrical, and the piston cap is a circular sheet arranged at the lower end of the piston rod.

Preferably, the piston rod is made of smooth metal.

Preferably, the lower shell is in trapezoidal connection with two hollow cylinders with different inner diameters, and the piston is arranged at the joint of the 2 hollow cylinders.

Preferably, the lower shell is of an integrated structure.

Preferably, the lower shell and the upper shell are in threaded connection.

Preferably, the plug further comprises a sealing ring, and the upper shell and the plug are connected through the sealing ring.

Preferably, the plug is a three-phase four-pole plug.

Compared with the prior art, the utility model discloses beneficial effect and showing the progress and lie in: the utility model provides a pressure sensor utilizes the floating control induction piston of piston and inductive switch's closure, has guaranteed the sealed effect of piston at the removal in-process through diaphragm, apron, the utility model discloses a pressure sensor design benefit, sealed effectual, the product precision is high.

Drawings

To more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments of the present invention will be briefly described below.

It should be apparent that the drawings in the following description are only for some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without any inventive exercise, and the other drawings also belong to the drawings required for the embodiments of the present invention.

Fig. 1 is an exploded view of a high-hermeticity pressure sensor in accordance with an embodiment of the present invention;

reference numerals: 1. the device comprises a combined gasket, 2, a lower shell, 3, a diaphragm, 4, a piston, 5, a cover plate, 6, a pressure plate, 7, an induction piston, 8, a spring, 9, an upper shell, 10, an induction switch, 11, an adjusting screw, 12, a sealing ring, 13, a plug, 14, a sealing tank, 15 and a socket.

Detailed Description

In order to make the purpose, technical solution, beneficial effect and obvious progress of the embodiments of the present invention clearer, the drawings provided in the embodiments of the present invention will be combined below to clearly and completely describe the technical solution in the embodiments of the present invention.

It is obvious that all of these described embodiments are only some, not all 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 efforts belong to the protection scope of the present invention.

It is to be understood that:

in the description of the embodiments of the present invention, the terms "upper", "lower", "top", "bottom", and other indicative orientations or positions are only used for describing the orientations or positional relationships shown in the drawings according to the embodiments of the present invention, and are not intended to indicate or imply specific orientations, specific orientation configurations, and operations that the devices or elements must have, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or movably connected, or integrated; either directly or indirectly through intervening media, intangible signal, or even optical, communication between two elements, or an interaction between two elements, unless expressly limited otherwise.

The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be further noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

The technical solution of the present invention will be described in detail with reference to specific examples.

Example 1

As shown in fig. 1, a high-tightness pressure sensor is shown, which includes a combination gasket 1, a lower housing 2, a diaphragm 3, a piston 4, a cover plate 5, a pressure plate 6, an induction piston 7, a spring 8, an upper housing 9, an induction switch 10, an adjusting screw 11, a sealing ring 12, a plug 13, a sealing cover 14 and a socket 15, wherein the lower housing 2, the upper housing 9 and the plug 13 are sequentially connected, the lower housing 2 and the upper housing 9 are hollow, and the diaphragm 3, the piston 4, the cover plate 5, the pressure plate 6, the induction piston 7, the spring 8 and the induction switch 10 are sequentially arranged inside the lower housing 2 and the upper housing 9; piston 4 includes piston rod and piston cap, the piston rod is cylindrical, the piston cap is for setting up in the disk of piston rod lower extreme, casing 2 under 3 butts of diaphragm are passed through to the lower extreme of piston 4, piston 4 is pegged graft in apron 5 and clamp plate 6, and but piston 4 is arranged in casing 2 down with floating from top to bottom, induction piston 7 is the inside cylinder that is equipped with the U groove, U inslot is arranged in to spring 8, but butt induction piston 7 when piston 4 floats from top to bottom, thereby it reciprocates to drive induction piston 7, induction piston 7 is portable to butt induction switch 10, induction switch 10 passes through the connection of electric lines with plug 13. The plug 13 can be inserted into the socket 15, the sealing cover 14 can be installed on the socket 15, the inductive switch 10 is installed in the upper shell 9 through the adjusting screw 11, and the sealing ring 12 is arranged at the connection position of the upper shell 9 and the plug 13. The combined gasket 1 is sleeved on the lower shell 2, so that the lower shell 2 is connected with an external component conveniently.

In this embodiment, the piston rod is made of smooth metal.

In this embodiment, the lower shell is a trapezoidal connection of two hollow cylinders with different inner diameters, and the piston is placed at the connection of the 2 hollow cylinders.

In this embodiment, the lower housing is an integral structure.

In this embodiment, the lower housing and the upper housing are threaded.

In this embodiment, the plug is a three-phase four-pole plug.

The pressure sensor of the present embodiment will be further described with reference to the use and principle of the high stability pressure sensor of the present embodiment.

1. Sequentially mounting all parts of the pressure sensor;

2. dropping oil into the diaphragm, the diaphragm being subjected to the pressure of the oil;

3. when the oil reaches a certain amount, the pressure forces the piston to move downwards; the cover plate and the pressure plate are sleeved on the piston, the diaphragm pushes the piston and the cover plate to integrally move, and the diaphragm and the cover plate are directly and tightly contacted, so that the sealing effect of the piston can be effectively ensured, and the stability of the displacement of the piston is not influenced;

4. the piston moves downwards to abut against the induction piston, and a spring inside the induction piston is compressed and deformed;

5. the induction piston is connected with the induction switch in an abutting mode, and the sensor circuit is connected.

To sum up, the utility model provides a pressure sensor, the principle is clear, the leakproofness is strong, and each spare part is simple, with low costs.

During the description of the above description:

the description of the terms "present embodiment," "embodiments of the invention," "as shown at … …," "further improved technical solutions," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention; in this specification, the schematic representations of the terms used above are not necessarily for the same embodiment or example, and the particular features, structures, materials, or characteristics described, etc., may be combined or brought together in any suitable manner in any one or more embodiments or examples; furthermore, those of ordinary skill in the art may combine or combine features of different embodiments or examples and features of different embodiments or examples described in this specification without undue conflict.

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 the same;

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 be modified or equivalent replaced by some or all of the technical features, and such modifications or replacements may not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A high-tightness pressure sensor is characterized by comprising a diaphragm, a piston, a cover plate, a pressure plate, a lower shell, an induction piston, a spring, an upper shell, an induction switch and a plug; the lower shell, the upper shell and the plug are sequentially connected, the lower shell and the upper shell are hollow, and the diaphragm, the piston, the cover plate, the pressure plate, the induction piston, the spring and the induction switch are sequentially arranged in the lower shell and the upper shell; the lower end of the piston is abutted to the lower shell through the diaphragm, the piston is inserted into the cover plate and the pressing plate, the piston can be arranged in the lower shell in a vertically floating mode, the induction piston is a cylinder with a U-shaped groove in the cylinder, the spring is arranged in the U-shaped groove, the piston can be abutted to the induction piston when vertically floating, so that the induction piston is driven to move up and down, the induction piston can move to abut to the induction switch, and the induction switch is connected with the plug through an electric wire.

2. The pressure sensor of claim 1, wherein the pressure plate has a recess at one end thereof, and the diaphragm, the piston and the cover plate are disposed in the recess.

3. The pressure sensor of claim 1, wherein the piston comprises a cylindrical piston rod and a piston cap, and the piston cap is a circular disc disposed at a lower end of the piston rod.

4. A highly hermetic pressure sensor as claimed in claim 3, wherein the piston rod is made of smooth metal.

5. The pressure sensor of claim 1, wherein the lower housing is a trapezoidal connection of two hollow cylinders with different inner diameters, and the piston is disposed at the connection of 2 hollow cylinders.

6. The pressure sensor of claim 5, wherein the lower housing is a one-piece structure.

7. The pressure sensor of claim 1, wherein the lower housing and the upper housing are threaded.

8. The pressure sensor of claim 1, further comprising a gasket, wherein the upper housing and the plug are connected by the gasket.

9. The pressure sensor of claim 1, wherein the plug is a three-phase four-pole plug.

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