Filling valve of liquid oxygen supply device

Abstract

The utility model relates to the technical field of liquid oxygen supply devices, and discloses a filling valve of a liquid oxygen supply device, which comprises a valve body, a vertically through liquid filling cavity arranged in the valve body, an upper mounting sleeve arranged at the upper part of the valve body and used for sealing an opening at the upper part of the liquid filling cavity, and a flow channel arranged in the upper mounting sleeve and communicated with the liquid filling cavity in the valve body, a vertical sliding rod is arranged in a liquid filling cavity of the valve body, the upper end of the sliding rod is sleeved with a movable guide ring, the guide ring is fixedly installed in the liquid filling cavity of the valve body through a plurality of supports, a channel for liquid oxygen to flow through is formed between the guide ring and the inner wall of the valve body, the sliding rod is sleeved with a compression spring, one end of the compression spring abuts against the guide ring, and the other end of the compression spring abuts against the support. The lower end of the sliding rod is sleeved with a fixed liquid filling sealing ring, and when the sliding rod is located at the lowest position, the liquid filling sealing ring seals an opening in the lower portion of the liquid filling cavity. The filling valve of the liquid oxygen supply device is good in sealing performance, leakage of liquid oxygen or gaseous oxygen is avoided, and filling of the liquid oxygen is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid oxygen oxygen supplier technical field, concretely relates to a liquid oxygen oxygen supplier filling valve. 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 above 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 aggravated, the physical fitness decreases obviously, and breathing difficulties. 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, the additional power supply is needed, and it is not convenient to carry for a long time in the field. The use of liquid oxygen oxygen supplier can meet the demand of light and large capacity.

[0005] The liquid oxygen oxygen supplier is generally filled through the filling valve, but because the pressure in the liquid oxygen oxygen supplier is large, the filling valve with opening and closing function is easy to leak liquid oxygen or gaseous oxygen, so a filling valve with good sealing performance is urgently needed. SUMMARY

[0006] The purpose of the utility model is to solve the above technical problems, provide a liquid oxygen oxygen supplier filling valve, which has good sealing performance, avoids liquid oxygen or gaseous oxygen leakage, and does not affect the filling of liquid oxygen.

[0007] In order to achieve the above purpose, the liquid oxygen oxygen supplier filling valve designed by the utility model, including the valve body, the inside is equipped with the liquid filling cavity which is through up and down, the upper installation sleeve which closes the liquid filling cavity upper opening is installed on the valve body upper part, the flow channel which is communicated with the liquid filling cavity inside the valve body is opened in the upper installation sleeve, the vertical slide rod is equipped in the liquid filling cavity of the valve body, the movable guide ring is sleeved on the upper end of the slide rod, the guide ring is fixedly installed in the liquid filling cavity of the valve body through a plurality of supports, and there is a liquid oxygen flow passage between the guide ring and the inner wall of the valve body, the compression spring is sleeved on the slide rod, one end of the compression spring abuts against the guide ring, the other end abuts against the support step arranged on the slide rod, the fixed liquid filling sealing ring is sleeved on the lower end of the slide rod, when the slide rod is located at the lowermost position, the liquid filling sealing ring seals the lower opening of the liquid filling cavity.

[0008] Preferably, the lower part of the guide ring and the upper part of the slide rod are provided with corresponding limiting steps, when the slide rod is pushed to the uppermost position, the limiting steps abut against each other to limit the slide rod, avoiding the slide rod from falling out.

[0009] Preferably, the lower end of the slide rod is further provided with a fixing ring for abutting the liquid-filled sealing ring against the supporting step, avoiding the liquid-filled sealing ring from falling off and affecting the sealing effect, the size of the fixing ring is smaller than the size of the lower opening of the liquid-filled cavity, and the fixing ring will not affect the stroke of the liquid-filled sealing ring.

[0010] Preferably, the lower opening of the liquid-filled cavity is funnel-shaped, the size of the fixing ring is funnel-shaped, and the included angle between the inclined edge of the fixing ring and the vertical direction is smaller than the included angle between the inclined edge of the lower opening of the liquid-filled cavity and the vertical direction, facilitating the downward movement of the fixing ring and being beneficial to guiding the slide rod.

[0011] Preferably, the lower opening of the liquid-filled cavity is funnel-shaped, which can better seal the lower opening of the liquid-filled cavity by the liquid-filled sealing ring.

[0012] Preferably, the outer wall of the upper mounting sleeve is provided with threads for mounting the upper mounting sleeve on the liquid oxygen oxygen supplier, and the threads on the outer wall of the upper mounting sleeve are provided with locking nuts.

[0013] Preferably, the upper mounting sleeve is threadedly connected with the valve body, the upper mounting sleeve is provided with machine screws, the machine screws pass through the upper mounting sleeve and are clamped in the external threads of the valve body, preventing loosening between the upper mounting sleeve and the valve body.

[0014] Preferably, the lower part of the valve body is further provided with a base cavity for inserting the filling base, the base cavity is provided with a locking ring for clamping the filling base, and a filling sealing ring is arranged between the upper part of the locking ring and the inner wall of the valve body, improving the sealing performance.

[0015] Preferably, the lower end of the valve body is provided with an inverted L-shaped groove for clamping the filling base.

[0016] Preferably, a sealing gasket is arranged between the upper mounting sleeve and the valve body, improving the sealing performance.

[0017] Compared with the prior art, the utility model has the following advantages: good sealing performance, avoiding liquid oxygen or gaseous oxygen leakage, and not affecting the filling of liquid oxygen. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the inside of the liquid oxygen oxygen supplier filling valve of the utility model.

[0019] Figure 2 It is a structural schematic view of the liquid oxygen oxygen supplier of the utility model.

[0020] The reference signs of the components in the figures are as follows:

[0021] Valve body 1, liquid filling cavity 2, upper mounting sleeve 3, slide rod 4, guide ring 5, compression spring 6, support step 7, liquid filling sealing ring 8, limiting step 9, fixing ring 10, thread 11, locking nut 12, machine screw 13, base cavity 14, locking ring 15, filling sealing ring 16, inverted L-shaped groove 17, sealing gasket 18. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] 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 the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Example 1

[0026] As Figure 1 and Figure 2As shown, a liquid oxygen supply filling valve includes a valve body 1 with a vertically penetrating filling chamber 2 inside. An upper mounting sleeve 3 is installed on the upper part of the valve body 1 to seal the upper opening of the filling chamber 2. The upper mounting sleeve 3 has a flow channel communicating with the filling chamber 2 inside the valve body 1. A vertical slide rod 4 is provided in the filling chamber 2 of the valve body 1. A movable guide ring 5 is fitted on the upper end of the slide rod 4. The guide ring 5 is fixedly installed in the filling chamber 2 of the valve body 1 by several brackets, and there is a channel for liquid oxygen to flow between the guide ring 5 and the inner wall of the valve body 1. A compression spring 6 is fitted on the slide rod 4. One end of the compression spring 6 abuts against the guide ring 5, and the other end abuts against the support step 7 provided on the slide rod 4. A fixed filling sealing ring 8 is fitted on the lower end of the slide rod 4. When the slide rod 4 is at its lowest position, the filling sealing ring 8 seals the lower opening of the filling chamber 2.

[0027] In this embodiment, under normal conditions, the liquid-filled sealing ring 8 on the slide rod 4 abuts against the opening below the liquid-filled cavity 2 under the action of the compression spring 6, thus sealing it.

[0028] In the filling state, the filling base is connected, and the filling base pushes the slide bar 4 to move upward. At this time, the compression spring 6 is compressed, and the liquid filling sealing ring 8 is separated from the opening below the liquid filling chamber 2, forming a filling channel inside the filling valve. The filled liquid oxygen enters the liquid filling chamber 2, further enters the flow channel of the upper mounting sleeve 3, and finally enters the liquid oxygen tank of the liquid oxygen supply unit.

[0029] After the liquid oxygen generator has finished filling with liquid oxygen, the filling valve is pulled off the filling base. At this time, the compression spring 6 is no longer under force, which will push the slide rod 4 downward. The filling sealing ring 8 will block the opening below the filling chamber 2, sealing it and preventing liquid oxygen from overflowing.

[0030] Example 2

[0031] like Figure 1 and Figure 2 As shown, a liquid oxygen supply filling valve includes a valve body 1 with a vertically penetrating filling chamber 2 inside. An upper mounting sleeve 3 is installed on the upper part of the valve body 1 to seal the upper opening of the filling chamber 2. The upper mounting sleeve 3 has a flow channel communicating with the filling chamber 2 inside the valve body 1. A vertical slide rod 4 is provided in the filling chamber 2 of the valve body 1. A movable guide ring 5 is fitted on the upper end of the slide rod 4. The guide ring 5 is fixedly installed in the filling chamber 2 of the valve body 1 by several brackets, and there is a channel for liquid oxygen to flow between the guide ring 5 and the inner wall of the valve body 1. A compression spring 6 is fitted on the slide rod 4. One end of the compression spring 6 abuts against the guide ring 5, and the other end abuts against the support step 7 provided on the slide rod 4. A fixed filling sealing ring 8 is fitted on the lower end of the slide rod 4. When the slide rod 4 is at its lowest position, the filling sealing ring 8 seals the lower opening of the filling chamber 2.

[0032] In this embodiment, the lower part of the guide ring 5 and the upper part of the slide rod 4 are provided with corresponding limiting steps 9. When the slide rod 4 is pushed to the uppermost position, the limiting steps 9 abut against each other, and when the slide rod 4 is pushed to the uppermost position, the limiting steps 9 abut against each other, thereby limiting the slide rod 4 and preventing it from falling out.

[0033] In addition, in this embodiment, the lower end of the slide rod 4 is further provided with a fixing ring 10 for fixing the liquid filling sealing ring 8 against the support step 7, thereby preventing the liquid filling sealing ring 8 from falling off and affecting the sealing effect. The size of the fixing ring 10 is smaller than that of the lower opening of the liquid filling cavity 2, and thus it will not affect the stroke of the liquid filling sealing ring 8.

[0034] In the conventional state, under the action of the compression spring 6, the liquid filling sealing ring 8 on the slide rod 4 abuts against the lower opening of the liquid filling cavity 2 to seal it.

[0035] In the filling state, the filling base is connected, the filling base pushes the slide rod 4 to move upward, at this time, the compression spring 6 is compressed, the liquid filling sealing ring 8 is separated from the lower opening of the liquid filling cavity 2, a filling channel is formed in the filling valve, the filled liquid oxygen enters the liquid filling cavity 2, further enters the flow channel of the upper mounting sleeve 3, and finally enters the liquid oxygen tank of the liquid oxygen oxygen supply device.

[0036] When the liquid oxygen oxygen supply device is filled with liquid oxygen, the filling valve is pulled off from the filling base, at this time, the compression spring 6 is no longer stressed, and thus pushes the slide rod 4 to move downward, the liquid filling sealing ring 8 blocks the lower opening of the liquid filling cavity 2 to seal it, thereby preventing the overflow of liquid oxygen.

[0037] Embodiment 3

[0038] As shown in Figure 1 and Figure 2 , a liquid oxygen oxygen supply device filling valve includes a valve body 1, an internally provided liquid filling cavity 2, an upper mounting sleeve 3 mounted on the upper part of the valve body 1 to seal the upper opening of the liquid filling cavity 2, a flow channel provided in the upper mounting sleeve 3 and communicated with the liquid filling cavity 2 of the valve body 1, a vertical slide rod 4 provided in the liquid filling cavity 2 of the valve body 1, a movable guide ring 5 sleeved on the upper end of the slide rod 4, the guide ring 5 being fixedly installed in the liquid filling cavity 2 of the valve body 1 through a plurality of supports, and a channel being provided between the guide ring 5 and the inner wall of the valve body 1 for the flow of liquid oxygen, a compression spring 6 sleeved on the slide rod 4, one end of the compression spring 6 abutting against the guide ring 5 and the other end abutting against a support step 7 provided on the slide rod 4, and a fixed liquid filling sealing ring 8 sleeved on the lower end of the slide rod 4, the liquid filling sealing ring 8 sealing the lower opening of the liquid filling cavity 2 when the slide rod 4 is located at the lowermost position.

[0039] In the embodiment, the lower part of the guide ring 5 and the upper part of the slide rod 4 are provided with corresponding limiting steps 9, when the slide rod 4 is pushed to the uppermost position, the limiting steps 9 abut against each other, when the slide rod 4 is pushed to the uppermost position, the limiting steps 9 abut against each other, limiting the slide rod 4, avoiding the slide rod 4 from falling out.

[0040] In addition, in the embodiment, the lower end of the slide rod 4 is further fixed with a fixing ring 10 which abuts the liquid filling sealing ring 8 against the supporting step 7, avoiding the liquid filling sealing ring 8 from falling off, affecting the sealing effect, the size of the fixing ring 10 is smaller than the size of the lower opening of the liquid filling cavity 2, not affecting the stroke of the liquid filling sealing ring 8.

[0041] In the embodiment, the lower opening of the liquid filling cavity 2 is funnel-shaped, which can better seal the lower opening of the liquid filling cavity 2 by the liquid filling sealing ring 8, the size of the fixing ring 10 is funnel-shaped, and the included angle between the inclined edge of the fixing ring 10 and the vertical direction is smaller than the included angle between the inclined edge of the lower opening of the liquid filling cavity 2 and the vertical direction, facilitating the downward movement of the fixing ring 10, and also being conducive to guiding the slide rod 4.

[0042] In the embodiment, in the normal state, under the action of the compression spring 6, the liquid filling sealing ring 8 on the slide rod 4 abuts against the lower opening of the liquid filling cavity 2, sealing the lower opening.

[0043] In the filling state, the filling base is connected, the filling base pushes the slide rod 4 to move upward, at this time, the compression spring 6 is compressed, the liquid filling sealing ring 8 is separated from the lower opening of the liquid filling cavity 2, a filling channel is formed in the filling valve, the filled liquid oxygen enters the liquid filling cavity 2, further enters the flow channel of the upper mounting sleeve 3, and finally enters the liquid oxygen tank of the liquid oxygen oxygen supplier.

[0044] When the liquid oxygen oxygen supplier completes the liquid oxygen filling, the filling valve is pulled off from the filling base, at this time, the compression spring 6 is no longer stressed, and will push the slide rod 4 to move downward, the liquid filling sealing ring 8 will block the lower opening of the liquid filling cavity 2, sealing the lower opening, avoiding the overflow of the liquid oxygen.

[0045] Embodiment 4

[0046] As Figure 1 and Figure 2As shown, a liquid oxygen oxygen supplier filling valve comprises a valve body 1, an upper and lower through liquid filling cavity 2 is arranged in the valve body 1, an upper mounting sleeve 3 is arranged on the upper part of the valve body 1 to seal the upper opening of the liquid filling cavity 2, a flow channel is arranged in the upper mounting sleeve 3 to communicate with the liquid filling cavity 2 in the valve body 1, a vertical sliding rod 4 is arranged in the liquid filling cavity 2 of the valve body 1, a movable guide ring 5 is sleeved on the upper end of the sliding rod 4, the guide ring 5 is fixedly arranged in the liquid filling cavity 2 of the valve body 1 through a plurality of supports, and a channel for liquid oxygen to flow through is arranged between the guide ring 5 and the inner wall of the valve body 1, a compression spring 6 is sleeved on the sliding rod 4, one end of the compression spring 6 abuts against the guide ring 5, and the other end abuts against a support step 7 arranged on the sliding rod 4, a fixed liquid filling sealing ring 8 is sleeved on the lower end of the sliding rod 4, and the liquid filling sealing ring 8 seals the lower opening of the liquid filling cavity 2 when the sliding rod 4 is located at the lowermost position.

[0047] In the embodiment, the lower part of the guide ring 5 and the upper part of the sliding rod 4 are both provided with corresponding limiting steps 9, the limiting steps 9 abut against each other when the sliding rod 4 is pushed to the uppermost position, and the limiting steps 9 abut against each other when the sliding rod 4 is pushed to the uppermost position, thereby limiting the sliding rod 4 and avoiding the sliding rod 4 from being pulled out.

[0048] In addition, in the embodiment, the lower end of the sliding rod 4 is further fixedly sleeved with a fixing ring 10 for abutting the liquid filling sealing ring 8 against the support step 7, thereby avoiding the liquid filling sealing ring 8 from falling off and affecting the sealing effect, the size of the fixing ring 10 is smaller than the size of the lower opening of the liquid filling cavity 2, and the fixing ring 10 does not affect the stroke of the liquid filling sealing ring 8.

[0049] In the embodiment, the lower opening of the liquid filling cavity 2 is funnel-shaped, which can better seal the lower opening of the liquid filling cavity 2 by the liquid filling sealing ring 8, the size of the fixing ring 10 is funnel-shaped, and the included angle between the inclined edge of the fixing ring 10 and the vertical direction is smaller than the included angle between the inclined edge of the lower opening of the liquid filling cavity 2 and the vertical direction, thereby facilitating the downward movement of the fixing ring 10 and being beneficial to guiding the sliding rod 4.

[0050] In the embodiment, the outer wall of the upper mounting sleeve 3 is provided with threads 11 for mounting the upper mounting sleeve 3 on the liquid oxygen oxygen supplier, a locking nut 12 is arranged on the threads 11 on the outer wall of the upper mounting sleeve 3, the upper mounting sleeve 3 is threadedly connected with the valve body 1, machine screws 13 are arranged on the upper mounting sleeve 3, the machine screws 13 pass through the upper mounting sleeve 3 and are clamped in the outer threads of the valve body 1, and the machine screws 13 prevent the upper mounting sleeve 3 and the valve body 1 from being loosened.

[0051] In the embodiment, the lower part of the valve body 1 is further provided with a base cavity 14 for inserting a filling base, a locking ring 15 is arranged in the base cavity 14 to clamp the filling base, a filling sealing ring 16 is arranged between the upper part of the locking ring 15 and the inner wall of the valve body 1, and the sealing property is improved.

[0052] In the embodiment, the lower end of the valve body 1 is provided with an inverted L-shaped groove 17 for clamping the filling base, which is used for fixing the filling base and the filling valve.

[0053] In the embodiment, in the normal state, the liquid filling sealing ring 8 on the slide rod 4 is pressed against the opening below the liquid cavity 2 to seal the opening under the action of the compression spring 6.

[0054] In the filling state, the filling base is connected, the filling base pushes the slide rod 4 to move upwards, at this time, the compression spring 6 is compressed, the liquid filling sealing ring 8 is separated from the opening below the liquid cavity 2, a filling channel is formed in the filling valve, the filled liquid oxygen enters the liquid cavity 2, further enters the flow channel of the upper mounting sleeve 3, and finally enters the liquid oxygen tank of the liquid oxygen oxygen supplier.

[0055] When the liquid oxygen oxygen supplier completes the liquid oxygen filling, the filling valve is pulled off from the filling base, at this time, the compression spring 6 is no longer stressed, and pushes the slide rod 4 to move downwards, the liquid filling sealing ring 8 blocks the opening below the liquid cavity 2 to seal the opening, so that the liquid oxygen is prevented from overflowing.

[0056] In addition, in the above embodiment, the sealing gasket 18 is arranged between the upper mounting sleeve 3 and the valve body 1, so that the sealing performance is further improved, and the sealing glue can be coated between the upper mounting sleeve 3 and the valve body 1 and between the locking ring 15 and the valve body 1, so that the sealing performance is improved. Compared with the prior art, the utility model has the following advantages: good sealing performance, avoiding liquid oxygen or gaseous oxygen leakage, and not affecting the filling of liquid oxygen.

[0057] The liquid oxygen oxygen supplier filling valve has good sealing performance, avoids liquid oxygen or gaseous oxygen leakage, and does not affect the filling of liquid oxygen.

[0058] Meanwhile, it needs to be explained that the description of the above technical solutions is exemplary, the present specification can be embodied in different forms, and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the present utility model disclosure be complete and complete, and will fully convey the scope disclosed by the present specification to those skilled in the art. In addition, the technical solutions of the utility model are limited by the scope of the claims. The features of various embodiments of the utility model can be partially or totally combined or spliced with each other, and can be executed in various different configurations as can be fully understood by those skilled in the art. The embodiments of the utility model can be executed independently of each other, or can be executed together in a mutually dependent relationship.

[0059] For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and the above structures should be regarded as belonging to the protection scope of the utility model.

Claims

1. A liquid oxygen oxygen supplier filling valve, comprising a valve body (1) internally provided with an up-and-down through filling cavity (2), characterized in that: The upper part of the valve body (1) is provided with an upper mounting sleeve (3) for sealing the upper opening of the liquid filling cavity (2), a flow channel is formed in the upper mounting sleeve (3) and communicates with the internal liquid filling cavity (2) of the valve body (1), a vertical sliding rod (4) is arranged in the liquid filling cavity (2) of the valve body (1), the upper end of the sliding rod (4) is sleeved with a movable guide ring (5), the guide ring (5) is fixedly arranged in the liquid filling cavity (2) of the valve body (1) through a plurality of supports, and a channel for liquid oxygen flow is formed between the guide ring (5) and the inner wall of the valve body (1), a compression spring (6) is sleeved on the sliding rod (4), one end of the compression spring (6) abuts against the guide ring (5), and the other end abuts against a supporting step (7) arranged on the sliding rod (4), and a fixed liquid filling sealing ring (8) is sleeved on the lower end of the sliding rod (4), when the sliding rod (4) is located at the lowermost position, the liquid filling sealing ring (8) seals the lower opening of the liquid filling cavity (2).

2. The filling valve of claim 1, wherein: The lower part of the guide ring (5) and the upper part of the sliding rod (4) are both provided with corresponding limiting steps (9), when the sliding rod (4) is pushed to the uppermost position, the limiting steps (9) abut against each other.

3. The filling valve of claim 1, wherein: The lower end of the sliding rod (4) is further fixedly sleeved with a fixing ring (10) for abutting the liquid filling sealing ring (8) against the supporting step (7), and the size of the fixing ring (10) is smaller than that of the lower opening of the liquid filling cavity (2).

4. The filling valve of claim 3, wherein: The lower opening of the liquid filling cavity (2) is funnel-shaped, the size of the fixing ring (10) is funnel-shaped, and the included angle between the inclined edge of the fixing ring (10) and the vertical direction is smaller than the included angle between the inclined edge of the lower opening of the liquid filling cavity (2) and the vertical direction.

5. The filling valve of claim 1, wherein: The lower opening of the liquid filling cavity (2) is funnel-shaped.

6. The filling valve of claim 1, wherein: The outer wall of the upper mounting sleeve (3) is provided with threads (11) for mounting it on the liquid oxygen supply device, and a locking nut (12) is arranged on the threads (11) on the outer wall of the upper mounting sleeve (3).

7. The filling valve of claim 1, wherein: The upper mounting sleeve (3) is threadedly connected with the valve body (1), the upper mounting sleeve (3) is provided with a machine screw (13), and the machine screw (13) is clamped in the external threads of the valve body (1) through the upper mounting sleeve (3).

8. The filling valve of claim 1, wherein: The lower part of the valve body (1) is further provided with a base cavity (14) for inserting a filling base, a locking ring (15) for clamping the filling base is arranged in the base cavity (14), and a filling sealing ring (16) is arranged between the upper part of the locking ring (15) and the inner wall of the valve body (1).

9. The filling valve of claim 1, wherein: The lower end of the valve body (1) is provided with an inverted L-shaped groove (17) for clamping the filling base.

10. The filling valve of claim 1, wherein: A sealing gasket (18) is arranged between the upper mounting sleeve (3) and the valve body (1).

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