Flow-limiting valve and liquid oxygen supply device

Abstract

The utility model discloses a flow-limiting valve and a liquid oxygen supply device, the flow-limiting valve is applied to the liquid oxygen supply device, the flow-limiting valve comprises a first connector, a second connector, a flow-limiting piece and a control piece, and the flow-limiting piece is rotatably connected between the first connector and the second connector; the control piece is connected with the flow limiting piece; the flow limiting piece comprises a first channel and a second channel, when the control piece rotates to the first contact, the first channel is communicated with the first connector and the second connector, and when the control piece rotates to the second contact, the second channel is communicated with the first connector and the second connector. According to the liquid oxygen supply device, two different oxygen supply flows can be set by arranging different channels and rotating the control piece, and the problem that the oxygen supply flow cannot be adjusted by an existing liquid oxygen supply device is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen supply device technical field, especially relate to a flow limiting valve and liquid oxygen oxygen supply device. BACKGROUND

[0002] With the increase of altitude on the plateau, the oxygen content of air also decreases accordingly. For example, the average altitude of Qinghai-Tibet Plateau is more than 4000 meters, the air is thin, the air pressure is low, and the normal oxygen supply demand of human body cannot be met, thereby causing hypoxia to cause multiple dysfunction of the body and even endanger life.

[0003] Especially when engaged in field work, with the increase of physical strength, more oxygen is consumed, and the plateau hypoxia reaction is more serious, the physical fitness decreases obviously, and breathing is difficult. The plateau sickness causes different degrees of harm to the human body, and even causes death when the hypoxia is serious.

[0004] At present, the main oxygen supply device on the market is to use gaseous oxygen bag to supply oxygen or air concentration to supply oxygen. The defects of the two ways are that the occupied space is large, the oxygen capacity is small, and the additional power supply is needed, which is not convenient for long time field carrying. Using liquid oxygen oxygen supply device can meet the demand of lightness and large capacity.

[0005] However, the existing liquid oxygen oxygen supply device often cannot adjust the oxygen supply flow, so that the user cannot change the oxygen supply flow according to the demand of the user or the environment. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a flow limiting valve and liquid oxygen oxygen supply device, which aims at solving the problem that the existing liquid oxygen oxygen supply device cannot adjust the oxygen supply flow.

[0007] In order to solve the above technical problems, the utility model aims at realizing the following technical scheme: a flow limiting valve is applied to liquid oxygen oxygen supply device, comprising: first joint, second joint, flow limiting piece and control piece, the flow limiting piece is rotatably connected between the first joint and the second joint, the control piece is connected with the flow limiting piece, wherein the flow limiting piece comprises first channel and second channel, when the control piece rotates to the first contact point, the first channel is connected with the first joint and the second joint respectively, when the control piece rotates to the second contact point, the second channel is connected with the first joint and the second joint respectively.

[0008] Further, the flow limiting valve further comprises: valve body, the valve body comprises vertical connection flow passage and limiting part, the installation cavity is arranged in the flow passage, the two ends of the installation cavity are connected with the first joint and the second joint respectively, the connecting hole is formed in the limiting part, and the flow limiting piece is inserted into the installation cavity through the connecting hole.

[0009] Further, the flow limiting piece comprises a flow limiting part and a rotating shaft, the flow limiting part is abutted in the mounting cavity, and the first channel and the second channel are staggered and arranged through the flow limiting part; the rotating shaft is inserted into the connecting hole, and one end of the rotating shaft is connected with the flow limiting part, and the other end of the rotating shaft is connected with the control piece.

[0010] Further, the flow limiting piece further comprises a limiting cover plate, the limiting cover plate is connected with the rotating shaft, and the limiting cover plate is abutted with the limiting part.

[0011] Further, the outer side wall of the limiting part is provided with a first limiting baffle and a second limiting baffle, the limiting cover plate is provided with a limiting piece, the control piece is reversely rotated to abut the first limiting baffle with the limiting piece, and the control piece is clockwise rotated to abut the second limiting baffle with the limiting piece.

[0012] Further, the limiting part is provided with an elastic piece and a positioning piece, one end of the positioning piece is abutted on the elastic piece, and the other end of the positioning piece is abutted on the limiting cover plate, the limiting cover plate is provided with a first positioning groove and a second positioning groove, the positioning piece is abutted on the first positioning groove when the control piece is rotated to the first contact point, and the positioning piece is abutted on the second positioning groove when the control piece is rotated to the second contact point.

[0013] Further, the flow limiting valve further comprises a first sealing washer and a second sealing washer, one end of the first sealing washer is abutted on the flow limiting part, and the other end of the first sealing washer is abutted on the first connector; one end of the second sealing washer is abutted on the flow limiting part, and the other end of the second sealing washer is abutted on the second connector.

[0014] Further, the flow limiting valve further comprises a first sealing washer and a second sealing washer, one end of the first sealing washer is abutted on the flow limiting part, and the other end of the first sealing washer is abutted on the first connector; one end of the second sealing washer is abutted on the flow limiting part, and the other end of the second sealing washer is abutted on the second connector.

[0015] Further, at least one sealing groove is arranged on the rotating shaft, and a third sealing washer is sleeved on the sealing groove.

[0016] The utility model further provides a liquid oxygen oxygen supply device, including liquid oxygen oxygen supply device body and like above-mentioned flow limiting valve, liquid oxygen oxygen supply device body includes liquid oxygen tank and oxygen inhalation pipe, the first connector connects the liquid oxygen tank, the second connector connects the oxygen inhalation pipe.

[0017] The utility model discloses a flow limiting valve and liquid oxygen oxygen supply device, wherein, the flow limiting valve is applied to liquid oxygen oxygen supply device, comprising: first joint, second joint, flow limiting piece and control piece, flow limiting piece rotatably connects between first joint and second joint, control piece connects flow limiting piece, wherein, flow limiting piece includes first channel and second channel, when control piece rotates to first contact, first channel is connected with first joint and second joint respectively, when control piece rotates to second contact, second channel is connected with first joint and second joint respectively. The utility model discloses through setting up different channels and through rotating control piece, can set up two different oxygen supply flow, solved the problem that the existing liquid oxygen oxygen supply device cannot adjust oxygen supply flow. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be briefly introduced the drawing needed to be used in the embodiment description, obviously, the drawing in the following description is some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0019] Figure 1 The structure schematic diagram of the flow limiting valve first perspective provided by the utility model embodiment is provided.

[0020] Figure 2 The structure schematic diagram of the flow limiting valve second perspective provided by the utility model embodiment is provided.

[0021] Figure 3 The section view A-A provided by the utility model embodiment is provided.

[0022] Figure 4 The structure schematic diagram of the flow limiting valve third perspective provided by the utility model embodiment is provided.

[0023] Figure 5 The section view B-B provided by the utility model embodiment is provided.

[0024] Figure 6 The structure schematic diagram of the flow limiting piece first perspective provided by the utility model embodiment is provided.

[0025] Figure 7 The section view C-C provided by the utility model embodiment is provided.

[0026] Figure 8 The structure schematic diagram of the flow limiting piece second perspective provided by the utility model embodiment is provided.

[0027] Figure 9 The explosion drawing of the flow limiting valve first perspective provided by the utility model embodiment is provided.

[0028] Figure 10The explosion drawing of the second visual angle of the flow limiting valve is provided.

[0029] Explanation of the marks in the figure:

[0030] 1, first joint;

[0031] 2, second joint;

[0032] 3, flow limiting piece; 31, first channel; 32, second channel; 33, flow limiting part; 34, rotating shaft; 341, sealing groove; 35, limiting cover plate; 351, limiting piece; 352, first positioning groove; 353, second positioning groove;

[0033] 4, control piece;

[0034] 5, valve body; 51, flow passage; 52, limiting part; 521, first limiting baffle; 522, second limiting baffle; 523, elastic piece; 524, positioning piece; 53, mounting cavity; 54, connecting hole;

[0035] 6, first sealing washer;

[0036] 7, second sealing washer;

[0037] 8, first sealing ring;

[0038] 9, second sealing ring;

[0039] 10, third sealing ring. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are some but not all of the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the utility model.

[0041] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0042] It should also be understood that the terms used in the specification of the utility model are only for the purpose of describing specific embodiments and do not intend to limit the utility model. As used in the specification and the appended claims of the utility model, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0043] It should be further understood that the term "and / or" used in the description and claims of the utility model means one or more of the associated listed items and all possible combinations, and includes these combinations.

[0044] In combination Figures 1-10 As shown in the utility model provides a flow limiting valve, be applied to liquid oxygen oxygen supply device, it is including: first joint 1, second joint 2, flow limiting piece 3 and control piece 4, flow limiting piece 3 rotatably connected between first joint 1 and second joint 2, control piece 4 connects flow limiting piece 3, wherein, flow limiting piece 3 includes first passage 31 and second passage 32, when control piece 4 rotates to first contact point, first passage 31 is connected with first joint 1 and second joint 2 respectively, when control piece 4 rotates to second contact point, second passage 32 is connected with first joint 1 and second joint 2 respectively.

[0045] In the utility model embodiment, first joint 1 and second joint 2 are connected on liquid oxygen oxygen supply device, and first passage 31 and second passage 32 provide two different oxygen supply flow for flow limiting valve, by rotating control piece 4 to first contact point, first passage 31 is connected with first joint 1 and second joint 2, and rotating control piece 4 to second contact point, second passage 32 is connected with first joint 1 and second joint 2, to solve the problem that the existing liquid oxygen oxygen supply device cannot adjust oxygen supply flow.

[0046] It can be understood that the first contact point and the second contact point represent the rotation angle of the control piece 4 or the rotation of the control piece 4 to the preset position.

[0047] In some specific embodiments, the flow limiting piece 3 includes at least the first passage 31 and the second passage 32, and multiple passages can be added to meet different oxygen supply flow.

[0048] In some embodiments, the flow limiting valve further comprises a valve body 5, the valve body 5 comprising a flow passage 51 and a limiting portion 52 connected perpendicularly, the flow passage 51 being provided with a mounting cavity 53, the two ends of the mounting cavity 53 being connected with the first joint 1 and the second joint 2 respectively, the limiting portion 52 being provided with a connecting hole 54, and the flow limiting piece 3 being inserted into the mounting cavity 53 through the connecting hole 54.

[0049] In this embodiment, the flow limiting piece 3 is inserted into the mounting cavity 53 through the connecting hole, the connecting hole 54 can limit the shaking and the up-down and left-right movement of the flow limiting piece 3, the mounting cavity 53 plays a sealing and protection role, and the two ends of the mounting cavity 53 are connected with the first joint 1 and the second joint 2 respectively, so that the oxygen flows through the flow limiting valve, and the oxygen supply flow of the liquid oxygen oxygen supply device is easily adjusted.

[0050] In some embodiments, the flow limiting member 3 comprises a flow limiting part 33 and a rotating shaft 34. The flow limiting part 33 is abutted in the installation cavity 53, and the first channel 31 and the second channel 32 are staggered and throughly arranged in the flow limiting part 33. The rotating shaft 34 is inserted into the connecting hole, and one end of the rotating shaft 34 is connected with the flow limiting part 33, and the other end is connected with the control member 4.

[0051] In the embodiment, one end of the rotating shaft 34 is connected with the flow limiting part 33, and the other end is connected with the control member 4. When the control member 4 rotates, the rotating shaft 34 rotates synchronously, thereby driving the flow limiting member 3 to rotate. The first channel 31 and the second channel 32 are staggered and throughly arranged in the flow limiting part 33, thereby providing two different oxygen supply flows for the flow limiting valve, and solving the problem that the existing liquid oxygen oxygen supplier cannot adjust the oxygen supply flow.

[0052] It can be understood that the first channel 31 and the second channel 32 are staggered and throughly arranged in the same plane in the flow limiting part 33, so as to ensure that the two channels can be connected with the first joint 1 and the second joint 2 when the control member 4 rotates.

[0053] In some embodiments, the flow limiting member 3 further comprises a limiting cover plate 35, which is connected with the rotating shaft 34, and the limiting cover plate 35 abuts against the limiting part 52.

[0054] In the embodiment, the limiting cover plate 35 abutting against the limiting part 52 can position the insertion position of the flow limiting part 33.

[0055] In some embodiments, the outer side wall of the limiting part 52 is provided with a first limiting baffle 521 and a second limiting baffle 522, the limiting cover plate 35 is provided with a limiting piece 351, the control member 4 can be reversely rotated to abut against the first limiting baffle 521, and the control member 4 can be clockwise rotated to abut against the second limiting baffle 522.

[0056] In the embodiment, the first limiting baffle 521 and the second limiting baffle 522 can limit the rotation angle of the control member 4, which is helpful for positioning the control member 4, and facilitates rotating to the first contact point or the second contact point. The limiting piece 351 abutting against the first limiting baffle 521 is the maximum angle of the control member 4 reversely rotating, and the limiting piece 351 abutting against the second limiting baffle 522 is the maximum angle of the control member 4 clockwise rotating.

[0057] In some embodiments, the limiting part 52 is provided with an elastic piece 523 and a positioning piece 524. One end of the positioning piece 524 abuts against the elastic piece 523, and the other end abuts against the limiting cover plate 35. The limiting cover plate 35 is provided with a first positioning groove 352 and a second positioning groove 353. When the control member 4 rotates to the first contact point, the positioning piece 524 abuts against the first positioning groove 352. When the control member 4 rotates to the second contact point, the positioning piece 524 abuts against the second positioning groove 353.

[0058] In the embodiment, one end of the positioning member 524 abuts against the elastic member 523, and the other end abuts against the limiting cover plate 35. When the control member 4 rotates, the positioning member 524 compresses the elastic member 523 until the control member 4 rotates to the first contact point, the positioning member 524 abuts against the first positioning groove 352, the first passage 31 is in communication with the first connector 1 and the second connector 2, and the control member 4 is rotated again until the control member 4 rotates to the second contact point, the positioning member 524 abuts against the second positioning groove 353, the second passage 32 is in communication with the first connector 1 and the second connector 2. The first contact point and the second contact point are taken as two different gears, the first gear is that the positioning member 524 abuts against the first positioning groove 352, the second gear is that the positioning member 524 abuts against the second positioning groove 353, and the flow limiting valve is in a closed state when the positioning member 524 does not abut against the first positioning groove 352 or the second positioning groove 353. Specifically, the positioning member 524 is spherical, and the first positioning groove 352 and the second positioning groove 353 are semicircular, which facilitates the rotation of the control member 4.

[0059] In some specific embodiments, the elastic member 523 and the positioning member 524 are arranged in the first limiting baffle 521 or the second limiting baffle 522, which helps to save the occupied space of the flow limiting valve.

[0060] In some embodiments, the flow limiting valve further comprises a first sealing washer 6 and a second sealing washer 7. One end of the first sealing washer 6 abuts against the flow limiting portion 33, and the other end abuts against the first connector 1. One end of the second sealing washer 7 abuts against the flow limiting portion 33, and the other end abuts against the second connector 2.

[0061] In the embodiment, the first sealing washer 6 and the second sealing washer 7 are used to seal the periphery of the communication part between the first passage 31, the second passage 32, the first connector 1 and the second connector 2, so as to prevent oxygen from leaking through the connection gap, and further improve the flow limiting effect of the flow limiting valve.

[0062] In some embodiments, the flow limiting valve further comprises a first sealing ring 8 and a second sealing ring 9. The first sealing ring 8 is arranged on the connection part between the first connector 1 and the valve body 5. The second sealing ring 9 is arranged on the connection part between the second connector 2 and the valve body 5.

[0063] In the embodiment, the first sealing ring 8 and the second sealing ring 9 are used to seal the connection part between the first connector 1, the second connector 2 and the valve body 5, so as to prevent oxygen from leaking during the conveying process.

[0064] In some embodiments, at least one sealing groove 341 is arranged on the rotating shaft 34, and a third sealing ring 10 is arranged on the sealing groove 341.

[0065] In the embodiment, the third sealing ring 10 is used to seal the gap between the rotating shaft 34 and the connecting hole.

[0066] Specifically, the sealing gasket and the sealing ring are made of low-temperature resistant material, such as polytetrafluoroethylene or UPE polymer material, which can reduce the influence of low temperature on the flow limiting valve and ensure the stable operation of the flow limiting valve under low temperature.

[0067] The utility model discloses still provide a kind of liquid oxygen oxygen supply device, including liquid oxygen oxygen supply device body (not shown) and the flow limiting valve as above, liquid oxygen oxygen supply device body includes liquid oxygen tank and oxygen inhalation tube, first joint 1 connects liquid oxygen tank, second joint 2 connects oxygen inhalation tube.

[0068] In the utility model embodiment, the liquid oxygen tank and the oxygen inhalation tube are connected by the flow limiting valve, two different oxygen supply flows are provided for the flow limiting valve, and the problem that the existing liquid oxygen oxygen supply device cannot adjust the oxygen supply flow is solved.

[0069] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A flow limiting valve applied to a liquid oxygen oxygen supplier, characterized in that, include: First connector; Second connector; A current limiting element, which is rotatably connected between the first connector and the second connector; Control component, the control component being connected to the current limiting component; The current limiting component includes a first channel and a second channel. When the control component rotates to the first contact point, the first channel connects to the first connector and the second connector respectively. When the control component rotates to the second contact point, the second channel connects to the first connector and the second connector respectively.

2. The flow restriction valve of claim 1, wherein Also includes: The valve body includes a flow section and a limiting section connected vertically. The flow section has an installation cavity, and the two ends of the installation cavity are respectively connected to the first connector and the second connector. The limiting section has a connection hole, and the flow limiting element passes through the connection hole and is inserted into the installation cavity.

3. The flow restriction valve of claim 2, wherein, The current limiting component includes: A flow-limiting part, which abuts against the mounting cavity, and the first channel and the second channel are staggered and penetrate through the flow-limiting part; A rotating shaft is inserted into the connecting hole, with one end of the rotating shaft connected to the flow limiting part and the other end connected to the control component.

4. The flow restriction valve of claim 3, wherein, The current limiting component also includes: A limiting cover plate is connected to the rotating shaft and abuts against the limiting part.

5. The flow restriction valve of claim 4, wherein, The outer wall of the limiting part is provided with a first limiting baffle and a second limiting baffle. The limiting cover is provided with a limiting member. The control member can rotate counterclockwise until the limiting member abuts against the first limiting baffle. The control member can rotate clockwise until the limiting member abuts against the second limiting baffle.

6. The flow restriction valve of claim 4, wherein, The limiting part is provided with an elastic element and a positioning element. One end of the positioning element abuts against the elastic element, and the other end abuts against the limiting cover plate. The limiting cover plate is provided with a first positioning groove and a second positioning groove. When the control element rotates to the first contact point, the positioning element abuts against the first positioning groove. When the control element rotates to the second contact point, the positioning element abuts against the second positioning groove.

7. The flow restriction valve of claim 3, wherein Also includes: The first sealing gasket has one end abutting against the flow-limiting part and the other end abutting against the first connector; The second sealing gasket has one end abutting against the flow-limiting part and the other end abutting against the second connector.

8. The flow restriction valve of claim 2, wherein, Also includes: A first sealing ring is fitted onto the connection between the first connector and the valve body. The second sealing ring is fitted onto the connection between the second connector and the valve body.

9. The flow restriction valve of claim 3, wherein, At least one sealing groove is provided on the rotating shaft, and a third sealing ring is fitted on the sealing groove.

10. A liquid oxygen oxygen supply device characterized by comprising: The device includes a liquid oxygen supply unit body and a flow limiting valve as described in any one of claims 1-9. The liquid oxygen supply unit body includes a liquid oxygen tank and an oxygen inhalation pipe. The first connector is connected to the liquid oxygen tank, and the second connector is connected to the oxygen inhalation pipe.

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