CN115779292A

CN115779292A - Flow indicator

Info

Publication number: CN115779292A
Application number: CN202211325174.6A
Authority: CN
Inventors: 岳思齐; 苏炳君; 杨佳韵; 樊程呈
Original assignee: AVIC Aerospace Life Support Industries Ltd
Current assignee: AVIC Aerospace Life Support Industries Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-14

Abstract

A flow indicator relates to the field of indicating devices. The flow indicator comprises a first shell and a second shell which are connected with each other, an indicator cavity is formed by enclosing the first shell and the second shell, the first shell and the second shell are respectively provided with a first connecting pipe and a second connecting pipe which are communicated with the indicator cavity, a piston and a spring of which two ends respectively press against the piston and the inner wall of the indicator cavity are arranged in the indicator cavity, and the first shell is made of transparent materials; when the oxygen flow in the second connecting pipe is above 0.5L/min, the piston is pushed to move from the second shell to the first shell. The flow indicator can accurately indicate the small-flow oxygen, and a user can check the oxygen conveying condition conveniently.

Description

Flow indicator

Technical Field

The application relates to the field of indicating devices, in particular to a flow indicator.

Background

The passenger oxygen mask is oxygen supply equipment of a civil aviation passenger-cargo aircraft under the emergency condition, when the passenger oxygen mask is used for emergency oxygen supply, a passenger needs to judge whether the oxygen supply is normal or not through the flow indicator, and the current flow indicator cannot visually display the oxygen supply condition under the low-flow condition because the flow of the oxygen is lower by only 0.5L/min at the moment.

Disclosure of Invention

An object of this application is to provide a flow indicator, its can be accurate instruct low flow oxygen, and the person of facilitating the use looks over the oxygen condition of carrying.

The embodiment of the application is realized as follows:

the embodiment of the application provides a flow indicator, which comprises a first shell and a second shell which are connected with each other, wherein an indicator cavity is formed by the first shell and the second shell in a surrounding mode; when the oxygen flow in the second connecting pipe is above 0.5L/min, the piston is pushed to move from the second shell to the first shell.

In some optional embodiments, one end of the piston is provided with a clamping groove, and the spring is pressed against the inner wall of the clamping groove.

In some optional embodiments, the inner wall of the clamping groove is provided with a boss, and the spring is pressed against the boss.

In some alternative embodiments, the other end of the piston is provided with a recess.

In some alternative embodiments, the bottom of the inner wall of the first housing is provided with an annular step.

In some alternative embodiments, the bottom of the inner wall of the second shell is provided with a plurality of convex points.

In some optional embodiments, the first casing is recessed towards an inner wall of one end of the second casing to form a limiting groove, and the second casing extends axially towards the inner wall of one end of the first casing to form an annular limiting part clamped with the limiting groove.

The beneficial effect of this application is: the flow indicator comprises a first shell and a second shell which are connected with each other, an indicator cavity is formed by enclosing the first shell and the second shell, a first connecting pipe and a second connecting pipe which are communicated with the indicator cavity are respectively arranged on the first shell and the second shell, a piston and a spring with two ends respectively abutting against the piston and the inner wall of the indicator cavity are arranged in the indicator cavity, and the first shell is made of transparent materials; when the oxygen flow in the second connecting pipe is above 0.5L/min, the piston is pushed to move from the second shell to the first shell. The flow indicator can accurately indicate the small-flow oxygen, and a user can check the oxygen conveying condition conveniently.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic diagram of an exploded structure of a flow indicator provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first housing in the flow indicator provided by the embodiment of the present application;

FIG. 3 is a schematic view of a second housing of the flow indicator according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional structural view of a piston in the flow indicator provided in the embodiment of the present application.

In the figure: 100. a first housing; 110. a second housing; 120. an indicator chamber; 130. a first connecting pipe; 140. a second connecting pipe; 150. a piston; 160. a spring; 170. a card slot; 180. a boss; 190. a pit; 200. a step; 210. salient points; 220. a limiting groove; 230. a limiting part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, detachable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The features and performance of the flow indicator of the present application are described in further detail below with reference to examples.

As shown in fig. 1, 2, 3, and 4, an embodiment of the present application provides a flow indicator, which includes a first housing 100 and a second housing 110 disposed above and below and connected to each other, where the first housing 100 and the second housing 110 are both prepared by polycarbonate mold-opening injection, the first housing 100 is transparent, the second housing 110 is white, an indicator cavity 120 is formed between the first housing 100 and the second housing 110, the first housing 100 is recessed towards an inner wall of one end of the second housing 110 to form a limiting groove 220, the second housing 110 is axially extended towards an inner wall of one end of the first housing 100 to form an annular limiting portion 230 clamped with the limiting groove 220, an annular step 200 is disposed at the bottom of an inner wall of the first housing 100, eight protruding points 210 circumferentially spaced along the inner wall are disposed at the bottom of the inner wall of the second housing 110, a first connecting pipe 130 and a second connecting pipe 140 communicated with the indicator cavity 120 are disposed at the top of the first housing 100 and the bottom of the second housing 110, a piston 150 and a spring 160 are disposed at the bottom of the indicator cavity 120, the piston 150 is prepared by polycarbonate mold-opening injection, a recessed point 180 is disposed at the top of the inner wall of the piston 100, and a bottom of the piston 100, a transparent boss 180 is disposed at the top of the piston 100, and a bottom of the boss 180, a boss 180 disposed at the boss 170, and a boss 180 disposed at the boss 180 disposed on the inner wall of the boss 100; when the oxygen flow rate in the second connection pipe 140 is above 0.5L/min, the piston 150 is pushed to move from the second housing 110 into the first housing 100.

The flow indicator provided by the embodiment of the application is formed by connecting a first shell 100 and a second shell 110, the first shell 100 and the second shell 110 enclose an indicator cavity 120 for accommodating a piston 150 and a spring 160, the top of the first shell 100 and the bottom of the second shell 110 are respectively provided with a first connecting pipe 130 and a second connecting pipe 140 for introducing or outputting oxygen into or out of the indicator cavity 120, the first shell 100 and the second shell 110 are respectively transparent and white, when the flow indicator is used, oxygen is introduced into the indicator cavity 120 from the second connecting pipe 140 to push the piston 150 to move along the indicator cavity 120 against the elastic force of the spring 160, when the flow rate of oxygen introduced into the second connecting pipe 140 is above 0.5L/min, the piston 150 is pushed to move into the transparent first shell 100 from the white second shell 110, at this time, a user can clearly check the green piston 150 through the first shell 100, thereby judging that the oxygen flow rate is in a normal oxygen supply state above 0.5L/min, when the air is introduced into the second shell 140, the piston 150 moves from the spring 160 to the second shell 100 under the elastic force, and the piston 150 cannot be observed in situ, and the piston 100 cannot be in the normal oxygen supply state.

The inner wall of one end, facing the second shell 110, of the first shell 100 is recessed to form a limiting groove 220, and the inner wall of one end, facing the first shell 100, of the second shell 110 extends in the axial direction to form an annular limiting part 230 clamped with the limiting groove 220, so that the connection stability of the first shell 100 and the second shell 110 can be effectively improved; the bottom of the inner wall of the first housing 100 is provided with an annular step 200, the bottom of the inner wall of the second housing 110 is provided with a convex point 210, the step 200 and the convex point 210 can press against the piston 150 to avoid blocking airflow outlets of the first connecting pipe 130 and the second connecting pipe 140 when the piston 150 is at the limit position, and ensure that oxygen is introduced into the indicator cavity 120 and pushes the piston 150 to move along the indicator cavity 120; the top end of the piston 150 is provided with a clamping groove 170, the inner wall of the clamping groove 170 is provided with a boss 180 for limiting the end position of the spring 160, the position of the spring 160 can be positioned by utilizing the boss 180 and the clamping groove 170, and the spring 160 is prevented from shaking in the piston 150; the bottom end of the piston 150 is provided with a pit 190, and when oxygen is introduced into the second connecting pipe 140, air flow is accumulated in the pit 190, so that the thrust of the air flow to the piston 150 is increased, and the precision and the detection sensitivity of the flow indicator are improved.

The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Claims

1. A flow indicator is characterized by comprising a first shell and a second shell which are connected with each other, wherein an indicator cavity is formed by the first shell and the second shell in a surrounding mode, the first shell and the second shell are respectively provided with a first connecting pipe and a second connecting pipe which are communicated with the indicator cavity, a piston and a spring with two ends respectively abutting against the piston and the inner wall of the indicator cavity are arranged in the indicator cavity, and the first shell is made of transparent materials; when the oxygen flow in the second connecting pipe is above 0.5L/min, the piston is pushed to move from the second shell to the first shell.

2. The flow indicator of claim 1, wherein the piston has a detent at one end, and the spring is biased against an inner wall of the detent.

3. The flow indicator of claim 2, wherein the inner wall of the slot is provided with a boss, and the spring is pressed against the boss.

4. The flow indicator of claim 2, wherein the other end of the piston is provided with a dimple.

5. The flow indicator of claim 1, wherein the bottom of the inner wall of the first housing is provided with an annular step.

6. The flow indicator of claim 1, wherein the bottom of the inner wall of the second housing is provided with a plurality of raised points.

7. The flow indicator of claim 1, wherein the first housing is recessed toward an inner wall of one end of the second housing to form a limiting groove, and the second housing extends axially toward an inner wall of one end of the first housing to form an annular limiting portion clamped with the limiting groove.