Gas pressure detection device with overpressure protection function

Abstract

The utility model provides a gas pressure detection device with an overpressure protection function, which comprises a gas pressure detection device main body, an elastic isolating membrane, a first pressure reference cavity and a pressure buffer part, and is characterized in that the pressure buffer part is hermetically connected with one side, close to a first sub-cavity, of the gas pressure detection device main body; one side, deviating from the first groove, of the first elastic corrugated isolation diaphragm is communicated with the first sub-cavity through a second pipeline; one side of the to-be-detected fluid loading part is in sealed connection with the side, close to the second sub-cavity, of the gas pressure detection device body, the open side of the second groove is sealed by a second elastic corrugated isolation diaphragm, and the side, away from the second groove, of the second elastic corrugated isolation diaphragm is communicated with the second sub-cavity through a third pipeline; the first pipeline is further provided with a sensing unit, the sensing unit is connected to a processing unit, and the processing unit is in communication connection with the host. The detection device can provide overload protection for the sensing unit.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and particularly relates to a gas pressure detection device with an overpressure protection function. Background Art

[0002] The gas pressure detection device is composed of a pressure measuring element sensing unit, a measuring circuit and a process connecting piece. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensing unit into standard electrical signals to supply secondary instruments such as indicating alarm instruments, recorders, and regulators for measurement, indication, and process adjustment. However, the gas pressure detection devices sold on the market at present often get damaged due to overloading of the pressure to be measured.

[0003] Therefore, it is urgent to propose a gas pressure detection device with an overpressure protection function to solve the technical problems existing in the prior art. Summary of the Utility Model

[0004] Aiming at the technical problem that the gas pressure detection devices sold on the market in the prior art often get damaged due to overloading of the pressure to be measured. The utility model proposes a gas pressure detection device with an overpressure protection function.

[0005] In a preferred embodiment of the utility model, a gas pressure detection device with an overpressure protection function is provided, and the gas pressure detection device includes:

[0006] A gas pressure detection device main body, which has an oval cavity inside;

[0007] An elastic isolation membrane, which divides the oval cavity into a first sub-cavity and a second sub-cavity;

[0008] A first pressure reference cavity, which is in fluid communication with the second sub-cavity through a first pipeline;

[0009] A pressure buffer part, which is hermetically connected to one side of the gas pressure detection device main body close to the first sub-cavity; a first open groove is provided on the side of the pressure buffer part hermetically connected to the gas pressure detection device main body, and the open side of the first groove is sealed by a first elastic corrugated isolation membrane sheet, and the side of the first elastic corrugated isolation membrane sheet facing away from the first groove is communicated with the first sub-cavity through a second pipeline;

[0010] A test fluid loading section, one side of the test fluid loading section is hermetically connected to one side of the main body of the gas pressure detection device close to the second sub-cavity. An open second groove is provided on the side of the test fluid loading section hermetically connected to the main body of the gas pressure detection device. The open side of the second groove is sealed by a second elastic corrugated isolation diaphragm. The side of the second elastic corrugated isolation diaphragm facing away from the second groove is communicated with the second sub-cavity through a third pipeline; wherein,

[0011] A sensing unit is further provided on the first pipeline. The sensing unit is connected to the processing unit, and the processing unit is communicatively connected to the host computer.

[0012] Preferably, the first sub-cavity and the second sub-cavity are filled with liquid polysiloxane.

[0013] Preferably, the vacuum degree in the first pressure reference cavity is 0 Kpa.

[0014] Preferably, the inside of the first groove is evacuated.

[0015] Preferably, the test fluid loading section is provided with a test fluid loading port fluidly connected to the second groove.

[0016] Compared with the prior art, the following beneficial effects can be obtained by the present utility model:

[0017] A gas pressure detection device with overpressure protection function of the present application has an oval cavity inside the main body of the gas pressure detection device, and the oval cavity is divided into a first sub-cavity and a second sub-cavity by using an elastic isolation membrane, and a pressure buffer part is sealed and connected to a side of the main body of the gas pressure detection device close to the first sub-cavity; an open first groove is provided on the side of the pressure buffer part that is sealed and connected to the main body of the gas pressure detection device, and the open side of the first groove is sealed by a first elastic corrugated isolation diaphragm, and the side of the first elastic corrugated isolation diaphragm that is away from the first groove is connected to the first sub-cavity through a second pipe; one side of the fluid loading part to be measured is sealed and connected to a side of the main body of the gas pressure detection device close to the second sub-cavity, and the fluid loading part to be measured is connected to the gas pressure detection device An open second groove is provided on one side of the sealing connection of the measuring device body, and the open side of the second groove is sealed by a second elastic corrugated isolation diaphragm, and the side of the second elastic corrugated isolation diaphragm facing away from the second groove is connected to the second sub-cavity through a third pipe; the first sub-cavity and the second sub-cavity are filled with liquid polysiloxane; this arrangement enables, when the pressure of the fluid to be measured in the second groove is overloaded, the second elastic corrugated isolation diaphragm transmits the overload pressure mainly to the liquid polysiloxane through deformation, thereby causing the elastic isolation diaphragm to deform, and after the elastic isolation diaphragm is deformed, the pressure is transmitted to the first elastic corrugated isolation diaphragm again, thereby avoiding the damage of the overload pressure to the sensing unit; in addition, the vacuum degree of the first pressure reference chamber is 0Kpa, which can provide a stable reference for the sensing unit and ensure its measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and their implementation methods.

[0019] Figure 1 A gas pressure detection device with overpressure protection function in one embodiment of the utility model is shown. DETAILED DESCRIPTION

[0020] The various aspects of the utility model are further described in detail below.

[0021] Unless otherwise defined or indicated, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein can be applied to the present invention.

[0022] Unless otherwise clearly specified and limited, the "or" mentioned in the present invention includes the relationship of "and". The "and" is equivalent to the Boolean logic operator "AND", the "or" is equivalent to the Boolean logic operator "OR", and "AND" is a subset of "OR".

[0023] It can be understood that although terms such as "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of the inventive concept of the present utility model.

[0024] In the present utility model, the terms "consisting essentially of..." and "consisting of..." are included in the terms "containing", "comprising" or "including".

[0025] Unless otherwise clearly specified and defined, the terms "connected", "communicated with", "coupled" in the present utility model shall be understood in a broad sense. For example, it may be a fixed connection, or may be connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] For example, if an element (or component) is referred to as being on another element, coupled with or connected to another element, then said one element may be directly formed on, coupled with or connected to said another element, or there may be one or more intermediate elements between them. On the contrary, if the expressions "directly on...", "directly coupled with..." and "directly connected with..." are used herein, it means that there are no intermediate elements. Other words used to illustrate the relationship between elements should be interpreted similarly, such as "between..." and "directly between...", "attached" and "directly attached", "adjacent" and "directly adjacent", etc.

[0027] In addition, it should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings. The words "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. It can be understood that herein, these terms are used to describe the relationship of one element, layer or region relative to another element, layer or region as shown in the drawings. Except for the orientations described in the drawings, these terms should also cover other orientations of the device.

[0028] Other aspects of the present utility model will be apparent to those of ordinary skill in the art in view of the disclosure herein.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[0030] It should also be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present application. The drawings only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. For example, the thickness of the elements in the drawings may be exaggerated for clarity.

[0031] Embodiment

[0032] As shown in the Figure 1 accompanying drawings, the present invention realizes a gas pressure detection device with overpressure protection function. The gas pressure detection device includes:

[0033] The main body 1 of the gas pressure detection device, which has an oval cavity inside.

[0034] The elastic isolation membrane 4, which divides the oval cavity into a first sub-cavity 2 and a second sub-cavity 3.

[0035] The first pressure reference chamber 9, which is in fluid communication with the second sub-cavity 3 through a first pipeline.

[0036] The pressure buffer part 14, which is hermetically connected to one side of the main body 1 of the gas pressure detection device close to the first sub-cavity 2. On the side of the pressure buffer part 14 hermetically connected to the main body 1 of the gas pressure detection device, there is an open first groove 13, and the open side of the first groove 13 is sealed by a first elastic corrugated isolation membrane 5. The side of the first elastic corrugated isolation membrane 5 facing away from the first groove 13 is in communication with the first sub-cavity 2 through a second pipeline.

[0037] The fluid to be measured loading part 8, one side of which is hermetically connected to one side of the main body 1 of the gas pressure detection device close to the second sub-cavity 3. On the side of the fluid to be measured loading part 8 hermetically connected to the main body 1 of the gas pressure detection device, there is an open second groove 7, and the open side of the second groove 7 is sealed by a second elastic corrugated isolation membrane 6. The side of the second elastic corrugated isolation membrane 6 facing away from the second groove 7 is in communication with the second sub-cavity 3 through a third pipeline. Wherein,

[0038] A sensing unit 10 is further provided on the first pipeline. The sensing unit pad is connected to a processing unit 11, and the processing unit is communicatively connected to a host 12.

[0039] Preferably, the first sub-cavity 2 and the second sub-cavity 3 are filled with liquid polysiloxane.

[0040] Preferably, the vacuum degree in the first pressure reference cavity 9 is 0 Kpa.

[0041] Preferably, a part inside the first groove 13 is filled with a fluid.

[0042] Preferably, the fluid under test loading part 8 is provided with a fluid under test loading port that is in fluid communication with the second groove 7.

[0043] Based on this application, those skilled in the art should understand that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0044] It should be noted that the above-mentioned embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

[0045] All documents mentioned in the present invention are cited as references in this application as if each document is cited separately as a reference. In addition, it should be understood that after reading the above content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A gas pressure detection device with overvoltage protection function, characterized in that, The gas pressure detection device includes: The main body of the gas pressure detection device, which has an oval cavity inside; An elastic isolation membrane that divides the oval cavity into a first sub-cavity and a second sub-cavity; A first pressure reference cavity that is fluidly connected to the second sub-cavity through a first pipeline; A pressure buffer part that is hermetically connected to one side of the main body of the gas pressure detection device close to the first sub-cavity; on the side of the pressure buffer part hermetically connected to the main body of the gas pressure detection device, there is an open first groove, the open side of the first groove is sealed by a first elastic corrugated isolation membrane, and the side of the first elastic corrugated isolation membrane facing away from the first groove is connected to the first sub-cavity through a second pipeline; A fluid to be measured loading part, one side of which is hermetically connected to one side of the main body of the gas pressure detection device close to the second sub-cavity, on the side of the fluid to be measured loading part hermetically connected to the main body of the gas pressure detection device, there is an open second groove, the open side of the second groove is sealed by a second elastic corrugated isolation membrane, and the side of the second elastic corrugated isolation membrane facing away from the second groove is connected to the second sub-cavity through a third pipeline; wherein, A sensing unit is further provided on the first pipeline, the sensing unit is connected to the processing unit, and the processing unit is communicatively connected to the host.

2. The gas pressure detection device with overvoltage protection function according to claim 1, characterized in that, Liquid polysiloxane is filled in the first sub-cavity and the second sub-cavity.

3. The gas pressure detection device with overvoltage protection function according to claim 2, characterized in that, The vacuum degree in the first pressure reference cavity is 0 Kpa.

4. The gas pressure detection device with overvoltage protection function according to claim 3, characterized in that, The inside of the first groove is evacuated.

5. The gas pressure detection device with overvoltage protection function according to claim 4, characterized in that, The fluid to be measured loading part is provided with a fluid to be measured loading port that is fluidly connected to the second groove.

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