Gas pressure detection device with overload protection mechanism

Abstract

The utility model provides a gas pressure detection device with an overload protection mechanism, and the device comprises a gas pressure detection device body which is internally provided with an oval cavity; the oval cavity is divided into a first sub-cavity and a second sub-cavity by the elastic isolating membrane; the first pressure reference cavity is in fluid communication with the first sub-cavity through a first pipeline; the second pressure reference cavity is in fluid communication with the second sub-cavity through a second pipeline; one side of the to-be-detected fluid loading part is in sealed connection with the gas pressure detection device main body, the open side of the to-be-detected fluid loading part is sealed by an elastic corrugated isolation diaphragm, and the second pipeline is communicated with one side, deviating from the groove, of the elastic corrugated isolation diaphragm through a branch pipeline; the second pipeline is further provided with a sensing unit, the sensing unit is connected to the 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 to a gas pressure detection device with an overload protection mechanism. Background Art

[0002] A 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 often get damaged due to overloading of the pressure to be measured.

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

[0004] In view of 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 overload protection mechanism.

[0005] In a preferred embodiment of the utility model, a gas pressure detection device with an overload protection mechanism 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 first sub-cavity through a first pipeline;

[0009] A second pressure reference cavity, which is in fluid communication with the second sub-cavity through a second pipeline;

[0010] A to-be-measured fluid loading part, one side of which is hermetically connected to the gas pressure detection device main body. An open groove is provided on the side of the to-be-measured fluid loading part that is hermetically connected to the gas pressure detection device main body, and the open side of the groove is sealed by an elastic corrugated isolation membrane. The second pipeline is communicated with the side of the elastic corrugated isolation membrane away from the groove through a third pipeline; wherein,

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

[0012] Preferably, the second sub-cavity is filled with liquid polysiloxane.

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

[0014] Preferably, the first pressure reference cavity is a vacuum cavity.

[0015] Preferably, the fluid under test loading part is provided with a fluid under test loading port that is in fluid communication with the groove.

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

[0017] A gas pressure detection device with an overload protection mechanism according to 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. The second sub-cavity is filled with liquid polysiloxane, and the first sub-cavity is in fluid communication with a first pressure reference cavity set to vacuum through a first pipeline. This setting enables when the pressure of the fluid under test in the groove is overloaded, the elastic corrugated isolation membrane transmits the overload pressure to the liquid polysiloxane through deformation, introducing it into the second sub-cavity, thereby causing the elastic isolation membrane to deform, and avoiding the damage of the overload pressure to the sensing unit; in addition, the vacuum degree of the second pressure reference cavity is 0 Kpa, which can provide a stable reference for the sensing unit and ensure its measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0019] Figure 1 Shows a gas pressure detection device with an overload protection mechanism in one embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will further elaborate on various aspects of the present utility model.

[0021] Unless otherwise defined or described, all professional and scientific terms used herein have the same meaning as those familiar to persons skilled in the art. In addition, any methods and materials similar or equivalent to the described content can be applied to the method of the present utility model.

[0022] Unless otherwise clearly specified and limited, the "or" described in the present utility model 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" of 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 the present 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 another element or connected to another element, then the said one element may be directly formed on, coupled with or connected to the said another element, or there may be one or more intermediate elements therebetween. On the contrary, if the expressions "directly on...", "directly coupled with..." and "directly connected with..." are used herein, it means there is no intermediate element. Other words used to describe 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 from 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 accompanying 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 diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The diagrams 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 its actual implementation can be arbitrarily changed, and the component layout type may also be more complex. For example, the thickness of the components in the accompanying drawings can 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 an overload protection mechanism. 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 cavity 5, which is in fluid communication with the first sub-cavity 2 through a first pipeline;

[0036] The second pressure reference cavity 9, which is in fluid communication with the second sub-cavity 3 through a second pipeline;

[0037] The fluid to be measured loading part 8, one side of which is hermetically connected to the main body 1 of the gas pressure detection device. An open groove 7 is provided on the side of the fluid to be measured loading part 8 that is hermetically connected to the main body 1 of the gas pressure detection device. The open side of the groove 7 is sealed by an elastic corrugated isolation membrane 6, and the second pipeline is connected to the side of the elastic corrugated isolation membrane 6 facing away from the groove through a third pipeline; wherein,

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

[0039] Preferably, the second sub-cavity 3 is filled with liquid polysiloxane.

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

[0041] Preferably, the first pressure reference chamber 5 is a vacuum chamber.

[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 groove 6.

[0043] It should be noted that by using an elastic isolation film to separate the oval cavity into a first sub-cavity and a second sub-cavity, the second sub-cavity is filled with liquid polysiloxane on the side adjacent to the main body of the gas pressure detection device. The first sub-cavity is in fluid communication with the first pressure reference chamber set to vacuum through a first pipeline. This setting enables when the pressure of the fluid under test in the groove is overloaded, the elastic corrugated isolation film transmits the overloaded pressure to the liquid polysiloxane through deformation. The liquid polysiloxane is squeezed to the elastic isolation film, causing the elastic isolation film to deform, thereby avoiding the damage of the overloaded pressure to the sensing unit. In addition, the vacuum degree of the second pressure reference chamber is 0 Kpa, which can provide a stable reference for the sensing unit and ensure its measurement accuracy. The pressure signal calculated by the processing unit based on the measurement signal provided by the sensing unit is displayed on the host display through the field bus.

[0044] Based on this application, those skilled in the art should understand that one 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, the device can be implemented and / or the method can be practiced using any number and aspects described herein. 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.

[0045] It should be noted that the above 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.

[0046] All the documents mentioned in the present invention are incorporated herein by reference as if each document was individually incorporated by 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 an overload protection mechanism, 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 first sub-cavity through a first pipeline; A second pressure reference cavity that is fluidly connected to the second sub-cavity through a second pipeline; A fluid under test loading part, one side of which is sealed to the main body of the gas pressure detection device. An open groove is provided on the side of the fluid under test loading part that is sealed to the main body of the gas pressure detection device. The open side of the groove is sealed by an elastic corrugated isolation membrane. The second pipeline is connected to the side of the elastic corrugated isolation membrane facing away from the groove through a third pipeline; wherein, A sensing unit is further provided on the second pipeline. The sensing unit is connected to a processing unit, and the processing unit is communicatively connected to a host computer.

2. The gas pressure detection device with an overload protection mechanism according to claim 1, characterized in that, The second sub-cavity is filled with liquid polysiloxane.

3. A gas pressure detection device with an overload protection mechanism according to claim 2, characterized in that, The vacuum degree in the second pressure reference cavity is 0 Kpa.

4. A gas pressure detection device with an overload protection mechanism according to claim 3, characterized in that, The first pressure reference cavity is a vacuum cavity.

5. A gas pressure detection device with an overload protection mechanism as described in claim 4, characterized in that, The fluid under test loading part is provided with a fluid under test loading port that is fluidly connected to the groove.

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