Liquid oxygen sub-tank filling mechanism

Abstract

The utility model discloses a liquid oxygen son tank filling mechanism which comprises a frame, a mother tank platform and a son tank platform are arranged in the frame, the son tank platform is arranged on the front side of the mother tank platform, and a filling structure is installed on the frame and located over the son tank platform. The frame is further provided with an installation assembly used for fixing the filling structure. The filling structure comprises a filling head, a starting assembly, an exhaust pipe and a connecting pipe, and the filling head and the exhaust pipe are vertically arranged and can communicate with the sub-tank at the same time; an exhaust pipe is fixed to one side of the filling head, and the upper end and the lower end of the exhaust pipe are open; one end of the connecting pipe is communicated with the filling head, and the other end of the connecting pipe is communicated with a mother tank; the starting assembly is located above the filling head so as to control opening and closing of the filling head. According to the liquid oxygen filling device, liquid oxygen in the primary tank can be conveniently filled into the secondary tank, and the filling speed is increased under the action of the exhaust pipe.

Description

Technical Field

[0001] The present application relates to the technical field of liquid oxygen tanks, and in particular to a liquid oxygen sub-tank filling mechanism. Background Art

[0002] As an important oxidant, liquid oxygen is widely used in aerospace, industrial production, medical and other fields. Traditional liquid oxygen tank design focuses on the safe storage and distribution of liquid oxygen. These systems are usually made of cryogenic insulation materials to ensure that liquid oxygen remains stable in low-temperature environments.

[0003] These tanks are equipped with safety valves, pressure regulators and delivery pipes to control and deliver liquid oxygen to the point of use. However, these tanks do not have the built-in function to refill other oxygen tanks. When other oxygen tanks need to be refilled, additional gasification equipment is often required to convert liquid oxygen into gas and then transfer the oxygen through a dedicated filling device, which is time-consuming and increases operational complexity. Utility Model Content

[0004] To this end, the present application provides a liquid oxygen sub-tank filling mechanism to solve the problem of the prior art lacking equipment for filling liquid oxygen from one storage tank to another.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A liquid oxygen sub-tank filling mechanism comprises a frame, wherein a main tank platform and a sub-tank platform are arranged in the frame, wherein the sub-tank platform is arranged at the front side of the main tank platform, a filling structure is installed on the frame, wherein the filling structure is located directly above the sub-tank platform, and an installation assembly for fixing the filling structure is also arranged on the frame;

[0007] The filling structure includes a filling head, a starting assembly, an exhaust pipe and a connecting pipe. The filling head and the exhaust pipe are arranged vertically and can be connected to the sub-tank at the same time; the exhaust pipe is fixed on one side of the filling head, and the upper and lower ends of the exhaust pipe are both opened; one end of the connecting pipe is connected to the filling head, and the other end is used to connect with the mother tank; the starting assembly is located above the filling head to control the opening and closing of the filling head.

[0008] Optionally, the outer diameter of the lower end of the exhaust pipe is smaller than the outer diameter of the upper end.

[0009] Optionally, the starting assembly includes a sliding rod, a fixed tube and a distributor, the sliding rod and the fixed tube are coaxially arranged with a vertical axis; the fixed tube is installed at the upper end of the filling head and is connected to the filling head, the lower end of the sliding rod is inserted into the fixed tube and can slide up and down along the fixed tube, and the outer wall of the sliding rod is in contact with the inner wall of the fixed tube; the distributor is fixed at the upper end of the sliding rod.

[0010] Further optionally, the starting assembly also includes a return spring, which is wound around the outer circumference of the sliding rod, one end of the return spring is connected to the fixed tube, and the other end is connected to the side wall of the sliding rod; the sliding rod slides downward to drive the return spring to deform, and the return spring rebounds to drive the sliding rod to slide upward.

[0011] Further optionally, the starting assembly further comprises an upper limit sleeve and a lower limit sleeve, wherein the lower limit sleeve is sleeved on the outer side of the fixed tube and the lower end is fixedly connected to the fixed tube, and the upper limit sleeve is sleeved on the outer periphery of the sliding rod and the upper end is fixedly connected to the distributor;

[0012] A limiting rod is extended downward from the lower end of the upper limit sleeve, and a limiting slot matching with the limiting rod is opened downward at the upper end of the lower limit sleeve. When the limiting rod contacts the bottom wall of the limiting slot, the sliding rod contacts the bottom of the fixed tube.

[0013] Further optionally, a clamping platform is extended to one side along the circumferential direction at the bottom of the limiting insertion rod, and a clamping groove corresponding to the clamping platform is provided at the bottom of the limiting slot.

[0014] Further optionally, one end of the upper surface of the card platform away from the limiting insertion rod gradually tilts upward, and the shape of the card slot is adapted to the shape of the card platform.

[0015] Optionally, a base is provided on the frame, and the base is located below the sub-tank platform; a vertical screw is fixed to the lower end of the sub-tank platform, and the screw passes through the base and can slide up and down relative to the base. A buffer spring is wrapped around the outer circumference of the screw, and one end of the buffer spring is connected to the base, and the other end is connected to the sub-tank platform.

[0016] Optionally, a positioning groove for placing the sub-tank is provided on the upper surface of the sub-tank platform, and the center of the positioning groove is directly below the filling head.

[0017] Optionally, the mounting assembly includes a slide rail and a slider, the slide rail is vertically mounted on the frame, and the slider is connected to the filling structure and can slide up and down along the slide rail.

[0018] Compared with the prior art, this application has at least the following beneficial effects:

[0019] 1. Through the filling mechanism, liquid oxygen can be easily transported from the mother tank to the child tank. And because an exhaust pipe is arranged on one side of the filling head, the air pressure inside and outside the child tank is balanced during the filling process, which can effectively increase the filling speed.

[0020] 2. The lower end of the exhaust pipe has a smaller diameter than the upper end. When the sub-tank is inserted into the lower end of the exhaust pipe for exhaust, the middle section of the exhaust pipe can fit with the sub-tank to prevent foreign matter from entering the sub-tank and contaminating the liquid oxygen.

[0021] 3. With the cooperation of the limit rod and the limit slot, when the slide bar is pressed into the bottom of the fixed tube, part of the pressure is shared, reducing the probability of damage to the slide bar and the fixed tube.

[0022] 4. By providing the card table and the card slot with inclined upper ends, the card table can be effectively prevented from rotating out of the card slot after the card table and the card slot are matched, thereby improving the reliability of the matching between the two.

[0023] 5. Under the action of the buffer spring, when the sub-tank is placed on the sub-tank platform, the sub-tank platform can obtain a certain buffering effect and also play the role of protecting the sub-tank.

[0024] 6. The positioning groove provides a placement position, which saves the time of position adjustment when placing the sub-tank, and helps to improve the filling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0026] Figure 1 A schematic structural diagram of a liquid oxygen sub-tank filling mechanism provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 Structural schematic diagram of the middle filling structure;

[0028] Figure 3 for Figure 1 Schematic diagram of the partial structure of the filling structure;

[0029] Figure 4 for Figure 1 Schematic diagram of the partial structure of the filling structure;

[0030] Figure 5 A schematic structural diagram of a liquid oxygen sub-tank filling mechanism provided in an embodiment of the present application;

[0031] Figure 6 for Figure 5 A magnified schematic diagram of center A.

[0032] Description of reference numerals:

[0033] 1. Frame; 2. Foot pad; 3. Caster; 4. Caster bracket; 5. Sub-tank platform; 6. Mother tank platform; 7. Filling structure; 71. Filling head; 72. Exhaust pipe; 73. Connecting pipe; 74. Slide rod; 75. Fixed pipe; 76. Distributor; 77. Reset spring; 78. Upper limit sleeve; 781. Limiting rod; 782. Card platform; 79. Lower limit sleeve; 791. Limiting slot; 792. Card slot; 793. Fixed ring; 794. Reinforcement ring; 8. Positioning slot; 9. Slide rail; 10. Slider; 11. Base; 12. Screw; 13. Buffer spring. DETAILED DESCRIPTION

[0034] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0035] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0036] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0037] A liquid oxygen sub-tank filling mechanism, referring to Figure 1 , including a frame 1, the bottom of the frame 1 is provided with a foot pad 2, a caster 3 and a corresponding caster 3 bracket, so as to achieve the effect of easy movement. A mother tank platform 6 and a child tank platform 5 are provided in the frame 1, and the child tank platform 5 is provided in front of the mother tank platform 6, and the child tank platform 5 is higher than the mother tank platform 6.

[0038] Reference Figure 2, a filling structure 7 for filling the liquid oxygen in the mother tank into the child tank is installed on the frame 1. The filling structure 7 is located directly above the child tank platform 5. In this embodiment, the filling structure 7 includes a filling head 71, a starting component, an exhaust pipe 72 and a connecting pipe 73. Among them, the filling head 71 and the exhaust pipe 72 are both arranged vertically and can be connected to the child tank at the same time. The former is used to fill the child tank with liquid oxygen, and the latter is used to balance the air pressure inside and outside the child tank. Correspondingly, an exhaust valve is set at the upper end of the child tank, and the exhaust valve is opened during the filling process, and the exhaust valve pipe wall is closed after the filling is completed. Specifically, the exhaust pipe 72 is fixed to one side of the filling head 71 by a connecting rod, and the upper and lower ends of the exhaust pipe 72 are both opened to play the role of connecting the inside and outside of the child tank. One end of the connecting pipe 73 is connected to the filling head 71, and the other end is used to communicate with the mother tank so as to fill the liquid oxygen in the mother tank into the child tank. The starting component is located above the filling head 71 to control the opening and closing of the filling head 71.

[0039] In order to prevent foreign matter from entering the sub-tank and contaminating the liquid oxygen during the filling and exhaust process, the diameter of the lower end of the exhaust pipe 72 is set to be smaller than the diameter of the upper end, so that after the exhaust pipe 72 is inserted into the exhaust valve of the sub-tank, the middle section of the exhaust pipe 72 can fit tightly against the exhaust valve, reducing the gap between the two.

[0040] Reference Figure 1 Furthermore, in order to save the alignment time when placing the sub-tank, a positioning groove 8 for placing the sub-tank is opened on the upper surface of the sub-tank platform 5, and the center of the positioning groove 8 is directly below the filling head 71, so that after the sub-tank is placed in the positioning groove 8, the filling port of the sub-tank can be aligned with the filling head 71, and the exhaust valve is aligned with the exhaust pipe 72.

[0041] Reference Figure 3 and Figure 4 The starting assembly includes a slide bar 74, a fixed tube 75 and a distributor 76. The slide bar 74 and the fixed tube 75 are coaxially arranged and the axis is vertical. Further, the axis of the slide bar 74 and the fixed tube 75 is arranged to be colinear with the axis of the filling head 71. The fixed tube 75 is installed at the upper end of the filling head 71 and is connected to the filling head 71. The lower end of the slide bar 74 is inserted into the fixed tube 75 and can slide up and down along the fixed tube 75. In order to make the filling work go smoothly, the outer wall of the slide bar 74 is fitted with the inner wall of the fixed tube 75 to reduce the gap between the two to ensure the stability of the internal air pressure of the starting assembly. The distributor 76 is fixed to the upper end of the slide bar 74. In order to facilitate gripping, the distributor 76 is arranged in a circular shape, and a plurality of grooves are arranged on the circumferential surface of the distributor 76 so that the operator can clamp his fingers in the grooves to achieve the effect of labor saving and anti-slip.

[0042] The starting assembly also includes a return spring 77. The return spring 77 is a compression spring, which is wound around the outer circumference of the slide bar 74. One end of the return spring 77 is welded to the upper end of the fixed tube 75, and the other end is welded to the side wall of the slide bar 74. The slide bar 74 slides downward to drive the return spring 77 to deform, and the return spring 77 rebounds to drive the slide bar 74 to slide upward. Specifically, when the starting assembly is not filled, only a small part of the lower end of the slide bar 74 is inserted into the fixed tube 75, and the return spring 77 is in a free state at this time; when the filling work is in progress, the return spring 77 is in a compressed state. Therefore, the distributor 76 is pressed downward to drive the slide bar 74 to slide down, and the filling work begins. After the distributor 76 is released, the return spring 77 rebounds, driving the slide bar 74 to slide up automatically, and the filling work is completed.

[0043] The starting assembly also includes an upper limit sleeve 78 and a lower limit sleeve 79, wherein the axes of the upper limit sleeve 78 and the lower limit sleeve 79 are both in line with the axis of the filling head 71. Specifically, the lower limit sleeve 79 is sleeved on the outer side of the fixed tube 75 and the lower end is fixedly connected to the peripheral wall of the fixed tube 75, and the upper limit sleeve 78 is sleeved on the outer periphery of the slide rod 74 and the upper end is fixedly connected to the distributor 76. A limit rod 781 extends downward (axially) from the lower end of the upper limit sleeve 78, and a limit slot 791 that cooperates with the limit rod 781 is opened downward at the upper end of the lower limit sleeve 79. It is arranged that when the limit rod 781 contacts the bottom wall of the limit slot 791, the slide rod 74 contacts the bottom of the fixed tube 75, so as to protect the slide rod 74 and the fixed tube 75.

[0044] The bottom of the limit rod 781 is provided with a clamping platform 782 extending to one side along the circumferential direction, and the bottom of the limit slot 791 is provided with a clamping slot 792 corresponding to the clamping platform 782. Therefore, after the distributor 76 is pressed down and the limit rod 781 contacts the bottom wall of the limit slot 791, the distributor 76 is rotated, driving the upper limit sleeve 78 to rotate, driving the clamping platform 782 to be clamped into the clamping slot 792, and the cooperation between the clamping platform 782 and the clamping slot 792 prevents the distributor 76 from sliding up under the rebound action of the return spring 77. In this way, both hands can be freed, so that the filling work can be carried out continuously, stably and automatically.

[0045] Furthermore, the end of the upper surface of the card platform 782 away from the limiting plug rod 781 is gradually tilted upward to form an inclined surface. Correspondingly, the shape of the card slot 792 is adapted to the shape of the card platform 782. Through the setting of the inclined surface, the card slot 792 and the card platform 782 form a ratchet-like structure, which prevents the upper limit sleeve from rotating in the reverse direction and bringing the card platform 782 out of the card slot 792, thereby improving the reliability of the card platform 782 and the card slot 792.

[0046] Reference Figure 1 and Figure 5Correspondingly, a mounting assembly for fixing the filling structure 7 is also provided on the frame 1. The mounting assembly includes a slide rail 9 and a slider 10, and the slide rail 9 is vertically mounted on the frame 1. The slider 10 is a right-angle plate, one end of which is fixedly connected to the filling structure 7, and the other end cooperates with the slide rail 9 to slide up and down along the slide rail 9.

[0047] In order to improve the stability of the filling structure 7 during the lifting process, two groups of mounting components are provided, which are respectively arranged on the left and right sides of the filling structure 7.

[0048] Reference Figure 2 To facilitate the installation and fixing of the assembly, two fixing rings 793 are provided on the peripheral wall of the lower limit sleeve 79. The two fixing rings 793 are distributed along the axial direction, and a certain gap is left between the two fixing rings 793. One of the sliders 10 is connected to the filling head 71, and the other slider 10 is inserted in the gap between the two fixing rings 793.

[0049] Furthermore, in order to improve the stability of the entire filling structure 7 , a reinforcement ring 794 is provided on the peripheral wall of the lower limit sleeve 79 , and the reinforcement ring 794 is provided above the two fixing rings 793 .

[0050] Reference Figure 5 and Figure 6 In order to protect the sub-tank and the sub-tank platform 5, a base 11 is provided on the frame 1. The base 11 is located below the sub-tank platform 5 and is directly fixed on the frame 1. A vertical screw 12 is fixed to the lower end of the sub-tank platform 5. The screw 12 passes through the base 11 and can slide up and down relative to the base 11. A buffer spring 13 is wound around the outer periphery of the screw 12. One end of the buffer spring 13 is connected to the base 11, and the other end is connected to the sub-tank platform 5. When the sub-tank is placed on the sub-tank platform 5, the sub-tank platform 5 moves downward under pressure, causing the buffer spring 13 to be compressed and deformed to play a buffering role.

[0051] It should be noted that although the same applicant previously applied for an invention structure named as an oxygen supply device with application number CN202410402839.1, it was continuously improved during the subsequent research and development process. During the experiment, it was found that the exhaust pipe 72 in this application can be used to increase the filling speed, and the buffer spring 13 is used to buffer and protect the sub-tank and the sub-tank platform 5. Therefore, although the structure of this application is similar to the invention of the prior application, it has better effects in terms of filling speed and safety of use.

[0052] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A liquid oxygen sub-tank filling mechanism, characterized in that: The invention comprises a frame (1), wherein a main tank platform (6) and a sub-tank platform (5) are arranged in the frame (1), wherein the sub-tank platform (5) is arranged in front of the main tank platform (6), and a filling structure (7) is installed on the frame (1), wherein the filling structure (7) is located directly above the sub-tank platform (5), and the frame (1) is also provided with a mounting assembly for fixing the filling structure (7); The filling structure (7) comprises a filling head (71), a starting assembly, an exhaust pipe (72) and a connecting pipe (73); the filling head (71) and the exhaust pipe (72) are both arranged vertically and can be connected to the sub-tank at the same time; the exhaust pipe (72) is fixed to one side of the filling head (71), and both upper and lower ends of the exhaust pipe (72) are opened; one end of the connecting pipe (73) is connected to the filling head (71), and the other end is used to be connected to the mother tank; the starting assembly is located above the filling head (71) to control the opening and closing of the filling head (71).

2. The liquid oxygen sub-tank filling mechanism according to claim 1 is characterized in that: The outer diameter of the lower end of the exhaust pipe (72) is smaller than the outer diameter of the upper end.

3. The liquid oxygen sub-tank filling mechanism according to claim 1 is characterized in that: The starting assembly includes a slide rod (74), a fixed tube (75) and a distributor (76); the slide rod (74) and the fixed tube (75) are coaxially arranged and the axis is vertical; the fixed tube (75) is installed at the upper end of the filling head (71) and is connected to the filling head (71); the lower end of the slide rod (74) is inserted into the fixed tube (75) and can slide up and down along the fixed tube (75), and the outer wall of the slide rod (74) is in contact with the inner wall of the fixed tube (75); the distributor (76) is fixed at the upper end of the slide rod (74).

4. The liquid oxygen sub-tank filling mechanism according to claim 3 is characterized in that: The starting assembly also includes a return spring (77), which is wound around the outer periphery of the slide rod (74), one end of the return spring (77) is connected to the fixed tube (75), and the other end is connected to the side wall of the slide rod (74); the slide rod (74) slides downward to drive the return spring (77) to deform, and the return spring (77) rebounds to drive the slide rod (74) to slide upward.

5. The liquid oxygen sub-tank filling mechanism according to claim 3 or 4, characterized in that: The starting assembly further comprises an upper limit sleeve (78) and a lower limit sleeve (79), wherein the lower limit sleeve (79) is sleeved on the outer side of the fixed tube (75) and the lower end is fixedly connected to the fixed tube (75), and the upper limit sleeve (78) is sleeved on the outer periphery of the sliding rod (74) and the upper end is fixedly connected to the distributor (76); A limiting rod (781) extends downward from the lower end of the upper limiting sleeve (78), and a limiting slot (791) is opened downward at the upper end of the lower limiting sleeve (79) to cooperate with the limiting rod (781). When the limiting rod (781) contacts the bottom wall of the limiting slot (791), the sliding rod (74) contacts the bottom of the fixed tube (75).

6. The liquid oxygen sub-tank filling mechanism according to claim 5, characterized in that: A clamping platform (782) is provided at the bottom of the limiting insertion rod (781) extending to one side along the circumferential direction, and a clamping slot (792) corresponding to the clamping platform (782) is provided at the bottom of the limiting slot (791).

7. The liquid oxygen sub-tank filling mechanism according to claim 6, characterized in that: The end of the upper surface of the card platform (782) away from the limiting plug rod (781) gradually tilts upward, and the shape of the card slot (792) is adapted to the shape of the card platform (782).

8. The liquid oxygen sub-tank filling mechanism according to claim 1 is characterized in that: The frame (1) is provided with a base (11), and the base (11) is located below the sub-tank platform (5); a vertical screw (12) is fixed to the lower end of the sub-tank platform (5), and the screw (12) passes through the base (11) and can slide up and down relative to the base (11); a buffer spring (13) is wound around the outer periphery of the screw (12), and one end of the buffer spring (13) is connected to the base (11), and the other end is connected to the sub-tank platform (5).

9. The liquid oxygen sub-tank filling mechanism according to claim 1, characterized in that: The upper surface of the sub-tank platform (5) is provided with a positioning groove (8) for placing the sub-tank, and the center of the positioning groove (8) is located directly below the filling head (71).

10. The liquid oxygen sub-tank filling mechanism according to claim 1, characterized in that: The mounting assembly comprises a slide rail (9) and a slider (10); the slide rail (9) is vertically mounted on the frame (1); the slider (10) is connected to the filling structure (7) and can slide up and down along the slide rail (9).

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