Flow switching control apparatus

Abstract

A flow switching control apparatus, comprising an end cover (2), an upper cover (6), a base (10), a distribution valve (11) and a flow limiting member. An upper part of the base (10) is provided with an oxygen chamber (B), the distribution valve (11) is assembled at the upper part of the oxygen chamber (B), a through hole is provided at an axial center of the upper cover (6), a mounting shaft (14) is assembled in the through hole, and the distribution valve (11) and the end cover (2) are fastened to a lower end and an upper end of the mounting shaft (14), respectively; the distribution valve (11) is provided with mounting holes (18), flow limiting members are assembled in the mounting holes (18), and the flow limiting members have a threaded fit with the mounting holes (18); upper surfaces and a lower surfaces of the flow limiting members are each provided with an air guiding groove (19), and the air guiding grooves (19) are in communication with each other by means of flow limiting holes (20); an oxygen flow is regulated by means of controlling inner diameters of the flow limiting holes (20); each mounting hole (18) is equipped with one flow limiting member, and the inner diameters of the flow limiting holes (20) on different flow limiting members are different, so as to implement switching and adjustment of the oxygen flow; a side surface of the upper cover (6) is provided with a gas guiding hole (D), and the bottom of the upper cover (6) is provided with a channel (C) in communication with the gas guiding hole (D); the position of the channel (C) corresponds to the positions of the mounting holes (18) in the distribution valve (11).

Description

A flow conversion control device Technical Field

[0001] The invention belongs to the flow regulation technology of an aircraft oxygen system and relates to a flow conversion control device. Background Art

[0002] Currently, the flow control of portable oxygen equipment on board is basically to set up two oxygen outlets on the portable oxygen equipment. The oxygen mask realizes different oxygen supply modes by connecting to different oxygen outlets. The operation steps are relatively cumbersome and not convenient for oxygen supply in emergency situations.

[0003] Summary of the Invention

[0004] The purpose of the present invention is to provide a flow conversion control device that integrates a flow limiting mechanism to achieve rapid switching of oxygen supply modes, reduce the probability of user misoperation, and improve the ergonomics of portable oxygen equipment.

[0005] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0006] A flow conversion control device includes an end cover, an upper cover, a base, a distribution valve, and a flow limiting member, wherein:

[0007] An oxygen chamber B is provided on the upper portion of the base, and a distribution valve is assembled on the upper portion of the oxygen chamber B, with its outer circumference cooperating with the inner wall of the oxygen chamber B; an air inlet port is provided at the bottom of the base; a through hole is provided at the axis center of the upper cover, a mounting shaft is assembled in the through hole, a sealing ring is arranged between the mounting shaft and the inner wall of the through hole, and the distribution valve and the end cover are respectively fixed to the lower end and the upper end of the mounting shaft;

[0008] A mounting hole is provided on the distribution valve, a flow limiting member is installed in the mounting hole, and the flow limiting member and the mounting hole are threaded together; air guide grooves are provided on the upper and lower surfaces of the flow limiting member, and the air guide grooves are connected through the flow limiting hole;

[0009] The distributing valve is provided with a plurality of mounting holes, each of which is equipped with a flow limiting element, and the inner diameters of the flow limiting holes on different flow limiting elements are different, so as to realize the conversion and adjustment of the oxygen flow rate;

[0010] An air guide hole D is provided on the side of the upper cover, and a channel C connected to the air guide hole D is provided from the bottom of the upper cover; the position of the channel C corresponds to the position of the mounting hole on the distribution valve.

[0011] Furthermore, a position limiting mechanism is provided between the end cover and the upper cover; the position limiting mechanism includes a spring groove distributed on the upper surface of the upper cover, a spring is installed in the spring groove, a pad is provided on the upper part of the spring, and a steel ball is installed on the upper part of the pad; a hemispherical groove is distributed on the lower surface of the end cover for cooperating with the upper part of the steel ball; when all the steel balls are stuck in the hemispherical groove by rotating the end cover, the mounting hole of the current limiting component is aligned with the channel C in the upper cover.

[0012] Furthermore, a circle of fixing plates is provided on the upper edge of the base, and the upper cover is a cylindrical structure with a circle of fixing rings provided on its lower edge; fixing holes that cooperate with each other are provided on the fixing ring of the upper cover and the fixing plate of the base; the upper cover is fixed to the base by screws passing through the fixing holes, and gaskets are provided around the fixing holes.

[0013] Furthermore, an end cover is installed on the upper part of the upper cover, and the upper end of the mounting shaft extends into the central groove of the lower part of the end cover.

[0014] Furthermore, a screw is passed through the distribution valve and screwed into the lower end of the installation shaft to fix the distribution valve to the installation shaft; a screw is passed through the end cover and screwed into the upper end of the installation shaft to fix the end cover to the installation shaft.

[0015] Furthermore, the mounting hole is a stepped hole, the larger hole is opened from the bottom surface of the distribution valve, and the smaller hole is opened from the top surface of the distribution valve, and the two are connected.

[0016] Furthermore, the flow limiting member is a cylindrical boss structure, wherein the boss on the flow limiting member is assembled in the smaller hole of the step hole.

[0017] Furthermore, a gasket is provided between the flow limiting member and the mounting hole.

[0018] Furthermore, a sealing ring is provided on the upper surface of the distribution valve around the mounting hole.

[0019] Furthermore, a sealing ring groove is opened around the channel C for cooperating with the sealing ring.

[0020] Furthermore, the decompressed oxygen enters the oxygen chamber B along the air inlet port of the base; when the flow mode needs to be selected, the end cover is rotated to drive the core rod and the distribution valve. When the mounting hole of the flow limiting component is aligned with the channel C on the bottom surface of the upper cover, the steel ball will be stuck in the hemispherical groove of the end cover. At this time, the oxygen will pass through the flow limiting hole in the flow limiting component, enter the air guide hole D through the channel C, and then enter the human breathing cavity through the oxygen supply device to realize oxygen supply.

[0021] Compared with the prior art, the present invention has the following technical features:

[0022] The present invention can achieve rapid switching of oxygen supply modes, reduce the probability of user misoperation, and improve the ergonomics of portable oxygen equipment. By connecting the oxygen mask to the flow conversion control device, the oxygen supply flow rate can be switched by simply turning the switch handle, without having to repeatedly plug and unplug the oxygen mask. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic cross-sectional view of the overall structure of the present invention;

[0024] FIG2 is a schematic diagram of the air guide hole D. FIG.

[0025] Explanation of the numbers in the figure: screw 1, end cover 2, steel ball 3, spacer 4, spring 5, upper cover 6, sealing ring 7, gasket 8, first flow limiting member 9, base 10, distribution valve 11, gasket 12, sealing ring 13, mounting shaft 14, second flow limiting member 15, air inlet port 16, fixing ring 17, mounting hole 18, air guide groove 19, flow limiting hole 20. DETAILED DESCRIPTION

[0026] Referring to the accompanying drawings, the present invention provides a flow conversion control device, which adds a flow conversion mechanism to the original portable oxygen equipment and integrates a flow limiting mechanism into the flow conversion, thereby achieving rapid switching of oxygen supply modes without the need to repeatedly plug and unplug the oxygen mask.

[0027] The control device specifically includes a screw 1, an end cap 2, a steel ball 3, a cushion block 4, a spring 5, an upper cover 6, a sealing ring 7, a gasket 8, a first flow limiter 9, a base 10, a distribution valve 11, a gasket 12, a sealing ring 13, a mounting shaft 14, and a second flow limiter 15, wherein:

[0028] An oxygen chamber B is provided on the upper part of the base 10, a circle of fixing plates is provided on the upper edge of the base 10, and an air inlet port 16 is provided at the bottom of the base 10; the distribution valve 11 is a cylindrical structure, and the distribution valve 11 is assembled on the upper part of the oxygen chamber B, and its outer circumference cooperates with the inner wall of the oxygen chamber B; the upper cover 6 is a cylindrical structure, and a circle of fixing rings 17 is provided on the lower edge; fixing holes that cooperate with each other are opened on the fixing ring 17 of the upper cover 6 and the fixing plate of the base 10; the upper cover 6 is fixed to the base 10 by passing the screws 1 through the fixing holes, and a gasket 12 is provided around the fixing holes.

[0029] A through hole is opened at the axis center of the upper cover 6, and a mounting shaft 14 is assembled in the through hole. A sealing ring 13 is arranged between the mounting shaft 14 and the inner wall of the through hole; a screw 1 is used to pass through the distribution valve 11 and screwed into the lower end of the mounting shaft 14 to fix the distribution valve 11 to the mounting shaft 14.

[0030] An end cover 2 is installed on the upper part of the upper cover 6, and the upper end of the mounting shaft 14 extends into the central groove at the lower part of the end cover 2; a screw 1 is passed through the end cover 2 and screwed into the upper end of the mounting shaft 14 to fix the end cover 2 to the mounting shaft 14.

[0031] A mounting hole 18 is provided on the distribution valve 11. The mounting hole 18 is a stepped hole. The larger hole is provided from the bottom surface of the distribution valve 11, and the smaller hole is provided from the top surface of the distribution valve 11, and the two are connected. A flow limiting member is assembled in the mounting hole 18. The flow limiting member is a cylindrical boss structure and is threadedly engaged with the mounting hole 18. The boss on the flow limiting member is assembled in the smaller hole of the stepped hole. Air guide grooves 19 are provided on the upper and lower surfaces of the flow limiting member. The air guide grooves 19 are connected through a flow limiting hole 20. The oxygen flow rate is adjusted by controlling the inner diameter of the flow limiting hole 20.

[0032] The distribution valve 11 is provided with multiple mounting holes 18 ; correspondingly, multiple flow restrictors are provided, and the inner diameters of the flow restrictor holes 20 on different flow restrictors are different to achieve conversion and regulation of the oxygen flow. A gasket 8 is provided between the flow restrictor and the mounting hole 18 .

[0033] In the example given in FIG1 , two flow limiting members are assembled, namely a first flow limiting member 9 and a second flow limiting member 15 . The inner diameters of the flow limiting holes 20 opened in the two members are different to meet different oxygen supply requirements. The threaded installation method is used to facilitate adjustment and replacement of different flow limiting members.

[0034] Furthermore, in order to prevent oxygen leakage, a sealing ring 7 is provided on the upper surface of the distribution valve 11 around the mounting hole 18 .

[0035] Referring to Figure 3, an air guide hole D is provided on the side of the upper cover 6, and a channel C is provided from the bottom of the upper cover 6 to communicate with the air guide hole D; the position of the channel C corresponds to the position of the mounting hole 18 on the distribution valve 11; a sealing ring groove is provided around the channel C for cooperating with the sealing ring 7.

[0036] A position limiting mechanism is provided between the end cover 2 and the upper cover 6; the position limiting mechanism includes a spring groove distributed on the upper surface of the upper cover 6, a spring 5 is installed in the spring groove, a pad 4 is provided on the upper part of the spring 5, and a steel ball 3 is installed on the upper part of the pad 4; a hemispherical groove is distributed on the lower surface of the end cover 2 for cooperating with the upper part of the steel ball 4; when the end cover 2 is rotated so that all the steel balls 4 are stuck in the hemispherical groove, the mounting hole 18 of the first flow limiting member 9 or the second flow limiting member 15 is aligned with the channel C in the upper cover 6.

[0037] The decompressed oxygen enters the oxygen chamber B from the air inlet port 16 of the base 10 along direction A; when the flow mode needs to be selected, the end cover 2 is rotated to drive the core rod 14 and the distribution valve 11. When the mounting hole 18 for the flow limiting component is aligned with the channel C on the bottom surface of the upper cover 6, the steel ball 3 will be stuck in the hemispherical groove of the end cover 2. At this time, the oxygen will pass through the flow limiting hole 20 in the flow limiting component and enter the air guide hole D through the channel C at a specific flow rate, and then enter the human respiratory cavity through the oxygen supply device to realize oxygen supply.

[0038] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A flow conversion control device, characterized in that: It comprises an end cover (2), an upper cover (6), a base (10), a distribution valve (11) and a flow limiting member, wherein: The upper part of the base (10) is provided with an oxygen chamber B, and the distribution valve (11) is mounted on the upper part of the oxygen chamber B, and its outer circumference is matched with the inner wall of the oxygen chamber B; the bottom of the base (10) is provided with an air inlet port (16); a through hole is opened at the axis center of the upper cover (6), and a mounting shaft (14) is mounted in the through hole, and a sealing ring (13) is arranged between the mounting shaft (14) and the inner wall of the through hole, and the distribution valve (11) and the end cover (2) are respectively fixed to the lower end and the upper end of the mounting shaft; The distribution valve (11) is provided with a mounting hole (18), a flow limiting component is installed in the mounting hole (18), and the flow limiting component and the mounting hole (18) are threadedly matched; the upper surface and the lower surface of the flow limiting component are both provided with air guide grooves (19), and the air guide grooves (19) are connected through the flow limiting hole (20); A plurality of the mounting holes (18) are provided on the distribution valve (11), and a flow limiting component is installed in each mounting hole (18). The flow limiting holes (20) on different flow limiting components have different inner diameters, so as to realize the conversion and adjustment of the oxygen flow rate; An air guide hole D is provided on the side of the upper cover (6), and a channel C connected to the air guide hole D is provided from the bottom of the upper cover (6); the position of the channel C corresponds to the position of the mounting hole (18) on the distribution valve (11).

2. The flow conversion control device according to claim 1, characterized in that: A position limiting mechanism is arranged between the end cover (2) and the upper cover (6); the position limiting mechanism comprises a spring groove distributed on the upper surface of the upper cover (6), a spring (5) is arranged in the spring groove, a cushion block (4) is arranged on the upper part of the spring (5), and a steel ball (3) is installed on the upper part of the cushion block (4); a hemispherical groove is distributed on the lower surface of the end cover (2) for cooperating with the upper part of the steel ball (4); when all the steel balls (4) are inserted into the hemispherical groove by rotating the end cover (2), the mounting hole (18) of the current limiting component is aligned with the channel C in the upper cover (6).

3. The flow conversion control device according to claim 1, characterized in that: The upper edge of the base (10) is provided with a circle of fixing plates, and the upper cover (6) is a cylindrical structure, and a circle of fixing rings (17) is provided on its lower edge; fixing holes that cooperate with each other are provided on the fixing rings (17) of the upper cover (6) and the fixing plates of the base (10); the upper cover (6) is fixed to the base (10) by screws (1) passing through the fixing holes, and gaskets (12) are provided around the fixing holes.

4. The flow conversion control device according to claim 1, characterized in that: The upper part of the upper cover (6) is installed with an end cover (2), and the upper end of the installation shaft (14) extends into the central groove at the lower part of the end cover (2).

5. The flow conversion control device according to claim 1, characterized in that: A screw (1) is passed through the distribution valve (11) and screwed into the lower end of the installation shaft (14) to fix the distribution valve (11) and the installation shaft (14); a screw (1) is passed through the end cover (2) and screwed into the upper end of the installation shaft (14) to fix the end cover (2) and the installation shaft (14).

6. The flow conversion control device according to claim 1, characterized in that: The mounting hole (18) is a stepped hole, the larger hole is opened from the bottom surface of the distribution valve (11), and the smaller hole is opened from the top surface of the distribution valve (11), and the two are connected.

7. The flow conversion control device according to claim 6, characterized in that: The flow limiting member is a cylindrical boss structure, wherein the boss on the flow limiting member is assembled in the smaller hole of the step hole.

8. The flow conversion control device according to claim 1, characterized in that: A sealing ring (7) is provided on the upper surface of the distribution valve (11) around the mounting hole (18).

9. The flow conversion control device according to claim 8, characterized in that: A sealing ring groove is provided around the channel C for cooperating with the sealing ring (7).

10. The flow conversion control device according to claim 1, characterized in that: The decompressed oxygen enters the oxygen chamber B along the air inlet port (16) of the base (10); when the flow mode needs to be selected, the end cover (2) is rotated to drive the core rod (14) and the distribution valve (11). When the mounting hole (18) for mounting the flow limiting component is aligned with the channel C on the bottom surface of the upper cover (6), the steel ball (3) will be stuck in the hemispherical groove of the end cover (2). At this time, the oxygen will pass through the flow limiting hole (20) in the flow limiting component, enter the air guide hole D through the channel C, and then enter the human respiratory cavity through the oxygen supply device to achieve oxygen supply.

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