Filling valve of liquid oxygen supply device

Abstract

The invention relates to the technical field of liquid oxygen supply devices, and discloses a liquid oxygen supply device filling valve which comprises a valve body, a vertically-through liquid filling cavity is formed in the valve body, an upper mounting sleeve for sealing an opening in the upper portion of the liquid filling cavity is mounted on the upper portion of the valve body, a flow channel communicated with the liquid filling cavity in the valve body is formed in the upper mounting sleeve, and a vertical sliding rod is arranged in the 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 a supporting step arranged on the sliding rod. 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 invention relates to the technical field of liquid oxygen supply devices, and in particular to a filling valve for a liquid oxygen supply device. Background Art

[0002] As the altitude increases on the plateau, the oxygen content in the air decreases accordingly. For example, the average altitude of the Qinghai-Tibet Plateau is above 4,000 meters, the air is thin and the air pressure is low, which cannot meet the normal oxygen supply needs of the human body, resulting in hypoxia, causing multifunctional disorders of the body and even endangering life.

[0003] Especially when doing outdoor work, as the physical strength increases, the oxygen consumption increases, which aggravates the plateau hypoxia reaction, significantly reduces physical strength, and makes breathing difficult. Altitude sickness and other diseases cause varying degrees of damage to the human body, and severe hypoxia can even cause death.

[0004] At present, the main oxygen supply devices on the market use gaseous oxygen bags or air concentration to supply oxygen. The disadvantages of these two methods are that they take up a lot of space, have a small oxygen capacity, require an additional power supply, and are not convenient to carry around in the field for a long time. Using a liquid oxygen supply can meet the needs of lightness and large capacity.

[0005] Liquid oxygen supply devices are generally filled through a filling valve. However, due to the high pressure inside the liquid oxygen supply device, the filling valve with an opening and closing function is very prone to liquid oxygen or gaseous oxygen leakage. Therefore, a filling valve with good sealing performance is urgently needed. Summary of the invention

[0006] The purpose of the present invention is to provide a liquid oxygen supply device filling valve in view of the deficiencies of the above-mentioned technology, which has good sealing performance, avoids leakage of liquid oxygen or gaseous oxygen, and does not affect the filling of liquid oxygen.

[0007] To achieve the above-mentioned purpose, the liquid oxygen supply device filling valve designed by the present invention comprises a valve body, a liquid filling cavity which runs through from top to bottom, an upper mounting sleeve which seals the upper opening of the liquid filling cavity is installed on the upper part of the valve body, a flow channel which is connected to the liquid filling cavity inside the valve body is opened in the upper mounting sleeve, a vertical sliding rod is provided in the 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 by a plurality of brackets, and a channel for liquid oxygen to flow through is provided 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 rests on the guide ring, and the other end rests on a supporting step provided on the sliding rod, the lower end of the sliding rod is sleeved with a fixed liquid filling sealing ring, and when the sliding rod is at the lowest 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 bar are provided with corresponding limiting steps, and when the slide bar is pushed to the uppermost part, the limiting steps abut against each other to limit the slide bar and prevent it from falling out.

[0009] Preferably, the lower end of the sliding rod is also fixed with a fixing ring which presses the liquid filling sealing ring against the supporting step to prevent the liquid filling sealing ring from falling and affecting the sealing effect. The size of the fixing ring is smaller than the size of the opening below the liquid filling cavity and will not affect the stroke of the liquid filling sealing ring.

[0010] Preferably, the opening below the liquid filling chamber is funnel-shaped, the size of the fixing ring is funnel-shaped, and the angle between the hypotenuse of the fixing ring and the vertical direction is smaller than the angle between the hypotenuse of the opening below the liquid filling chamber and the vertical direction, which facilitates the downward movement of the fixing ring and is also beneficial for guiding the sliding rod.

[0011] Preferably, the lower opening of the liquid filling chamber is funnel-shaped, so that the liquid filling sealing ring can better seal the lower opening of the liquid filling chamber.

[0012] Preferably, a thread for mounting the upper mounting sleeve on a liquid oxygen supplier is provided on the outer wall of the upper mounting sleeve, and a locking nut is provided on the thread on the outer wall of the upper mounting sleeve.

[0013] Preferably, the upper mounting sleeve is threadedly connected to the valve body, and a machine screw is provided on the upper mounting sleeve. The machine screw passes through the upper mounting sleeve and is clamped in the external thread of the valve body to prevent loosening between the upper mounting sleeve and the valve body.

[0014] Preferably, a base cavity is further provided at the lower part of the valve body for inserting the filling base, a locking ring is provided in the base cavity for clamping the filling base, and a filling sealing ring is provided between the upper part of the locking ring and the inner wall of the valve body to improve 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 provided between the upper mounting sleeve and the valve body to improve the sealing performance.

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

[0018] Figure 1 It is a schematic diagram of the structure inside the filling valve of the liquid oxygen supply device of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the liquid oxygen supplier of the present invention.

[0020] The components in the figure are numbered as follows:

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

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1

[0026] like Figure 1 and Figure 2As shown, a filling valve of a liquid oxygen supply device comprises a valve body 1, in which a liquid filling chamber 2 which passes through from top to bottom is provided, an upper mounting sleeve 3 which seals the upper opening of the liquid filling chamber 2 is mounted on the upper part of the valve body 1, a flow channel which communicates with the liquid filling chamber 2 inside the valve body 1 is opened in the upper mounting sleeve 3, a vertical sliding rod 4 is arranged in the liquid filling chamber 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 mounted in the liquid filling chamber 2 of the valve body 1 through a plurality of brackets, and a channel for liquid oxygen to flow through is provided 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, a fixed liquid filling sealing ring 8 is sleeved on the lower end of the sliding rod 4, and when the sliding rod 4 is located at the lowest position, the liquid filling sealing ring 8 seals the lower opening of the liquid filling chamber 2.

[0027] When this embodiment is used, under normal conditions, under the action of the compression spring 6, the liquid filling sealing ring 8 on the slide rod 4 presses against the opening below the liquid filling chamber 2 to seal it.

[0028] In the filling state, the filling base is connected, and the filling base pushes the slide rod 4 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 supplier.

[0029] When the liquid oxygen supplier completes the filling of liquid oxygen, the filling valve is pulled off the filling base. At this time, the compression spring 6 is no longer subjected to force, and it will push the slide rod 4 to move downward, and the filling sealing ring 8 will block the opening below the filling chamber 2, sealing it to prevent liquid oxygen from overflowing.

[0030] Example 2

[0031] like Figure 1 and Figure 2 As shown, a filling valve of a liquid oxygen supply device comprises a valve body 1, in which a liquid filling chamber 2 which passes through from top to bottom is provided, an upper mounting sleeve 3 which seals the upper opening of the liquid filling chamber 2 is mounted on the upper part of the valve body 1, a flow channel which communicates with the liquid filling chamber 2 inside the valve body 1 is opened in the upper mounting sleeve 3, a vertical sliding rod 4 is arranged in the liquid filling chamber 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 mounted in the liquid filling chamber 2 of the valve body 1 through a plurality of brackets, and a channel for liquid oxygen to flow through is provided 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, a fixed liquid filling sealing ring 8 is sleeved on the lower end of the sliding rod 4, and when the sliding rod 4 is located at the lowest position, the liquid filling sealing ring 8 seals the lower opening of the liquid filling chamber 2.

[0032] In this embodiment, corresponding limiting steps 9 are provided at the bottom of the guide ring 5 and the top of the slide rod 4. When the slide rod 4 is pushed to the top, 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 also fixed with a fixing ring 10 that presses the liquid filling sealing ring 8 against the supporting step 7 to prevent the liquid filling sealing ring 8 from falling and affecting the sealing effect. The size of the fixing ring 10 is smaller than the size of the opening below the liquid filling chamber 2 and will not affect the stroke of the liquid filling sealing ring 8.

[0034] When this embodiment is used, under normal conditions, under the action of the compression spring 6, the liquid filling sealing ring 8 on the slide rod 4 presses against the opening below the liquid filling chamber 2 to seal it.

[0035] In the filling state, the filling base is connected, and the filling base pushes the slide rod 4 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 supplier.

[0036] When the liquid oxygen supplier completes the filling of liquid oxygen, the filling valve is pulled off the filling base. At this time, the compression spring 6 is no longer subjected to force, and it will push the slide rod 4 to move downward, and the filling sealing ring 8 will block the opening below the filling chamber 2, sealing it to prevent liquid oxygen from overflowing.

[0037] Example 3

[0038] like Figure 1 and Figure 2 As shown, a filling valve of a liquid oxygen supply device comprises a valve body 1, in which a liquid filling chamber 2 which passes through from top to bottom is provided, an upper mounting sleeve 3 which seals the upper opening of the liquid filling chamber 2 is mounted on the upper part of the valve body 1, a flow channel which communicates with the liquid filling chamber 2 inside the valve body 1 is opened in the upper mounting sleeve 3, a vertical sliding rod 4 is arranged in the liquid filling chamber 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 mounted in the liquid filling chamber 2 of the valve body 1 through a plurality of brackets, and a channel for liquid oxygen to flow through is provided 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, a fixed liquid filling sealing ring 8 is sleeved on the lower end of the sliding rod 4, and when the sliding rod 4 is located at the lowest position, the liquid filling sealing ring 8 seals the lower opening of the liquid filling chamber 2.

[0039] In this embodiment, corresponding limiting steps 9 are provided at the bottom of the guide ring 5 and the top of the slide rod 4. When the slide rod 4 is pushed to the top, the limiting steps 9 abut against each other, thereby limiting the slide rod 4 and preventing it from falling out.

[0040] In addition, in this embodiment, the lower end of the slide rod 4 is also fixed with a fixing ring 10 that presses the liquid filling sealing ring 8 against the supporting step 7 to prevent the liquid filling sealing ring 8 from falling and affecting the sealing effect. The size of the fixing ring 10 is smaller than the size of the opening below the liquid filling chamber 2 and will not affect the stroke of the liquid filling sealing ring 8.

[0041] In this embodiment, the opening below the liquid filling chamber 2 is funnel-shaped, which enables the liquid filling sealing ring 8 to better seal the opening below the liquid filling chamber 2. The size of the fixing ring 10 is funnel-shaped, and the angle between the hypotenuse of the fixing ring 10 and the vertical direction is smaller than the angle between the hypotenuse of the opening below the liquid filling chamber 2 and the vertical direction, which facilitates the downward movement of the fixing ring 10 and is also beneficial for guiding the slide rod 4.

[0042] When this embodiment is used, under normal conditions, under the action of the compression spring 6, the liquid filling sealing ring 8 on the slide rod 4 presses against the opening below the liquid filling chamber 2 to seal it.

[0043] In the filling state, the filling base is connected, and the filling base pushes the slide rod 4 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 supplier.

[0044] When the liquid oxygen supplier completes the filling of liquid oxygen, the filling valve is pulled off the filling base. At this time, the compression spring 6 is no longer subjected to force, and it will push the slide rod 4 to move downward, and the filling sealing ring 8 will block the opening below the filling chamber 2, sealing it to prevent liquid oxygen from overflowing.

[0045] Example 4

[0046] like Figure 1 and Figure 2As shown, a filling valve of a liquid oxygen supply device comprises a valve body 1, in which a liquid filling chamber 2 which passes through from top to bottom is provided, an upper mounting sleeve 3 which seals the upper opening of the liquid filling chamber 2 is mounted on the upper part of the valve body 1, a flow channel which communicates with the liquid filling chamber 2 inside the valve body 1 is opened in the upper mounting sleeve 3, a vertical sliding rod 4 is arranged in the liquid filling chamber 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 mounted in the liquid filling chamber 2 of the valve body 1 through a plurality of brackets, and a channel for liquid oxygen to flow through is provided 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, a fixed liquid filling sealing ring 8 is sleeved on the lower end of the sliding rod 4, and when the sliding rod 4 is located at the lowest position, the liquid filling sealing ring 8 seals the lower opening of the liquid filling chamber 2.

[0047] In this embodiment, corresponding limiting steps 9 are provided at the bottom of the guide ring 5 and the top of the slide rod 4. When the slide rod 4 is pushed to the top, the limiting steps 9 abut against each other, thereby limiting the slide rod 4 and preventing it from falling out.

[0048] In addition, in this embodiment, the lower end of the slide rod 4 is also fixed with a fixing ring 10 that presses the liquid filling sealing ring 8 against the supporting step 7 to prevent the liquid filling sealing ring 8 from falling and affecting the sealing effect. The size of the fixing ring 10 is smaller than the size of the opening below the liquid filling chamber 2 and will not affect the stroke of the liquid filling sealing ring 8.

[0049] In this embodiment, the opening below the liquid filling chamber 2 is funnel-shaped, which enables the liquid filling sealing ring 8 to better seal the opening below the liquid filling chamber 2. The size of the fixing ring 10 is funnel-shaped, and the angle between the hypotenuse of the fixing ring 10 and the vertical direction is smaller than the angle between the hypotenuse of the opening below the liquid filling chamber 2 and the vertical direction, which facilitates the downward movement of the fixing ring 10 and is also beneficial for guiding the slide rod 4.

[0050] In this embodiment, a thread 11 for mounting the upper mounting sleeve 3 on a liquid oxygen supply device is provided on the outer wall of the upper mounting sleeve 3, a locking nut 12 is provided on the thread 11 on the outer wall of the upper mounting sleeve 3, the upper mounting sleeve 3 is threadedly connected to the valve body 1, and a machine screw 13 is provided on the upper mounting sleeve 3. The machine screw 13 passes through the upper mounting sleeve 3 and is stuck in the external thread of the valve body 1 to prevent loosening between the upper mounting sleeve 3 and the valve body 1.

[0051] In this embodiment, a base cavity 14 for inserting a filling base is further provided at the lower part of the valve body 1. A locking ring 15 for clamping the filling base is provided in the base cavity 14. A filling sealing ring 16 is provided between the locking ring 15 and the inner wall of the valve body 1 to improve the sealing performance.

[0052] In this embodiment, an inverted L-shaped groove 17 for clamping the filling base is provided at the lower end of the valve body 1, so as to fix the filling base and the filling valve.

[0053] When this embodiment is used, under normal conditions, under the action of the compression spring 6, the liquid filling sealing ring 8 on the slide rod 4 presses against the opening below the liquid filling chamber 2 to seal it.

[0054] In the filling state, the filling base is connected, and the filling base pushes the slide rod 4 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 supplier.

[0055] When the liquid oxygen supplier completes the filling of liquid oxygen, the filling valve is pulled off the filling base. At this time, the compression spring 6 is no longer subjected to force, and it will push the slide rod 4 to move downward, and the filling sealing ring 8 will block the opening below the filling chamber 2, sealing it to prevent liquid oxygen from overflowing.

[0056] In addition, in the above embodiment, a sealing gasket 18 is provided between the upper mounting sleeve 3 and the valve body 1 to further improve the sealing performance. At the same time, a sealing glue may be applied between the upper mounting sleeve 3 and the valve body 1, and a sealing glue may be applied between the locking ring 15 and the valve body 1 to improve the sealing performance. Compared with the prior art, the present invention has the following advantages: good sealing performance, avoiding leakage of liquid oxygen or gaseous oxygen, and not affecting the filling of liquid oxygen.

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

[0058] At the same time, it should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be construed as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims. The features of the various embodiments of the present invention may be partially or completely combined or spliced ​​with each other, and may be performed in various different configurations as those skilled in the art may fully understand. The embodiments of the present invention may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0059] For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, and the above structures should be regarded as belonging to the protection scope of the present invention.

Claims

1. A filling valve for a liquid oxygen supply device, comprising a valve body (1) with a liquid filling chamber (2) extending vertically therein, characterized in that: An upper mounting sleeve (3) is mounted on the upper part of the valve body (1) to seal the upper opening of the liquid filling chamber (2). A flow channel is opened in the upper mounting sleeve (3) to communicate with the liquid filling chamber (2) inside the valve body (1). A vertical slide bar (4) is arranged in the liquid filling chamber (2) of the valve body (1). A movable guide ring (5) is sleeved on the upper end of the slide bar (4). The guide ring (5) is fixedly mounted in the liquid filling chamber (2) of the valve body (1) through a plurality of brackets, and the guide ring There is a channel for liquid oxygen to flow between the inner wall of the valve body (5) and the slide rod (4). A compression spring (6) is sleeved on the slide 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) provided on the slide rod (4). A fixed liquid-filling sealing ring (8) is sleeved on the lower end of the slide rod (4). When the slide rod (4) is located at the bottom, the liquid-filling sealing ring (8) seals the lower opening of the liquid-filling chamber (2).

2. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The lower part of the guide ring (5) and the upper part of the slide bar (4) are both provided with corresponding limiting steps (9), and when the slide bar (4) is pushed to the uppermost part, the limiting steps (9) abut against each other.

3. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The lower end of the slide rod (4) is also fixedly sleeved with a fixing ring (10) for pressing the liquid filling sealing ring (8) against the supporting step (7), and the size of the fixing ring (10) is smaller than the size of the lower opening of the liquid filling cavity (2).

4. The liquid oxygen supply device filling valve according to claim 3, characterized in that: The lower opening of the liquid filling chamber (2) is funnel-shaped, the size of the fixing ring (10) is funnel-shaped, and the angle between the hypotenuse of the fixing ring (10) and the vertical direction is smaller than the angle between the hypotenuse of the lower opening of the liquid filling chamber (2) and the vertical direction.

5. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The lower opening of the liquid filling chamber (2) is funnel-shaped.

6. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The outer wall of the upper mounting sleeve (3) is provided with a thread (11) for mounting it on a liquid oxygen supply device, and the thread (11) on the outer wall of the upper mounting sleeve (3) is provided with a locking nut (12).

7. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The upper mounting sleeve (3) is threadedly connected to the valve body (1); a machine screw (13) is provided on the upper mounting sleeve (3); the machine screw (13) passes through the upper mounting sleeve (3) and is clamped in the external thread of the valve body (1).

8. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The lower part of the valve body (1) is also provided with a base cavity (14) for inserting a filling base, the base cavity (14) is provided with a locking ring (15) for clamping the filling base, and a filling sealing ring (16) is provided between the upper part of the locking ring (15) and the inner wall of the valve body (1).

9. The liquid oxygen supply device filling valve according to claim 1, characterized in that: The lower end of the valve body (1) is provided with an inverted L-shaped groove (17) for clamping the filling base.

10. The liquid oxygen supply device filling valve according to claim 1, characterized in that: A sealing gasket (18) is provided between the upper mounting sleeve (3) and the valve body (1).

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