One-way valve, low-temperature liquid pressurization system and low-temperature liquid pressurization assembly

Abstract

The invention provides a one-way valve, a low-temperature liquid pressurization system and a low-temperature liquid pressurization assembly. The one-way valve comprises a valve seat, a liquid inlet is formed in the valve seat in a penetrating mode, a plurality of elastic pieces are fixed to the inner wall of the first end of the liquid inlet at intervals, and the elastic pieces obliquely extend back to the valve seat; the liquid inlet is covered with the valve element, and the valve element is connected with the elastic piece in an abutting mode; the plurality of horizontal wings are respectively connected with the circumferential direction of the valve core; and the multiple guide columns correspond to the multiple horizontal wings one to one, one guide column penetrates through one horizontal wing and is fixedly connected with the valve seat, and the horizontal wings are movably connected with the guide columns. By the adoption of the check valve, in the return stroke process, the check valve is jointly opened through the negative pressure and the elastic force effect of the elastic piece on the valve element, the opening difficulty of the check valve is reduced, and the situation that the check valve is difficult to open is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature boosting, and in particular to a one-way valve, a low-temperature liquid boosting system and a low-temperature liquid boosting assembly. Background Art

[0002] At low temperatures, gas can be stored in a storage container in a liquefied form to obtain a higher storage density. Supplying liquefied gas to the vaporizer at a higher pressure can directly obtain higher pressure gas without compression during the gas filling process, which is much more efficient than the gas compression process.

[0003] In order to supply the liquefied gas fuel to the gasifier with a high enough pressure, a low-temperature booster pump is usually used to pump the liquefied gas. During the return stroke, the piston is lifted, and the one-way valve at the liquid inlet is opened under the action of negative pressure, and the liquid is added to the piston cylinder; during the stroke, the piston is compressed, and the one-way valve at the liquid inlet is closed, and then the liquid is pressurized and discharged. However, during the compression of the piston, the one-way valve at the liquid inlet needs to withstand a pressure of 30-90MPa or even higher, so the valve core of the one-way valve needs to have a good pressure-bearing capacity, which results in the valve core of the one-way valve being very heavy. During the return stroke, the one-way valve is often difficult to open because it is simply forced to open by negative pressure. Summary of the invention

[0004] In view of this, the present invention provides a one-way valve, a cryogenic liquid pressurizing system and a cryogenic liquid pressurizing assembly. During the return process, the one-way valve opens by means of negative pressure and the elastic force of the spring on the valve core, thereby overcoming the defects of the prior art.

[0005] The one-way valve provided by the present invention comprises:

[0006] A valve seat, wherein a liquid inlet is formed through the valve seat, and a plurality of spring pieces are fixed to the inner wall of a first end of the liquid inlet at intervals, and the plurality of spring pieces extend obliquely away from the valve seat;

[0007] A valve core, the valve core covers the liquid inlet and abuts against the elastic sheet;

[0008] A plurality of horizontal wings, wherein the plurality of horizontal wings are respectively connected to the circumference of the valve core;

[0009] A plurality of guide posts are provided, and the plurality of guide posts correspond to the plurality of horizontal wings one by one. One guide post passes through one horizontal wing and is fixedly connected to the valve seat. The horizontal wing is movably connected to the guide post.

[0010] Optionally, the angle between the spring sheet and the horizontal plane is 2-5°.

[0011] Optionally, the inner wall diameter of the first end of the liquid inlet is larger than the inner wall diameter of the second end opposite to the first end.

[0012] Optionally, the spring sheet and the valve seat are integrally formed.

[0013] The present invention also provides a low-temperature liquid pressurization system, comprising the one-way valve described in any one of the above items, and also comprising: a piston cylinder, a piston cavity is provided in the piston cylinder, and a liquid outlet connected to the piston cavity is opened through the piston cylinder, the liquid outlet is connected to a liquid outlet pipe, and a liquid outlet one-way valve is provided in the liquid outlet pipe; a piston, the piston is arranged in the piston cavity and is movably connected to the piston cavity; a transmission shaft, the transmission shaft passes through the piston cylinder and is connected to the piston; the end of the piston cylinder facing away from the transmission shaft is connected to the valve seat of the one-way valve, and the valve core, horizontal wing and guide column cover of the one-way valve are arranged in the accommodating cavity.

[0014] Optionally, the cryogenic liquid pressurization system further includes: a driving assembly, wherein the driving assembly is drivingly connected to the transmission shaft to drive the transmission shaft to reciprocate along the piston cylinder.

[0015] Optionally, the cryogenic liquid pressurizing system further comprises: a coaxial positioner, wherein the coaxial positioner is sleeved on the transmission shaft and fixedly connected to the piston cylinder.

[0016] Optionally, the inner diameter of the piston cylinder toward one end of the one-way valve gradually decreases in the direction toward the one-way valve; the outer diameter of the piston toward one end of the one-way valve gradually decreases in the direction toward the one-way valve.

[0017] Optionally, a sealing ring is provided on the circumferential sleeve of the piston.

[0018] The present invention also provides a cryogenic liquid pressurizing assembly, comprising a liquid storage tank and the cryogenic liquid pressurizing system described in any one of the above items, wherein the piston cylinder of the cryogenic liquid pressurizing system is fixed in the liquid storage tank.

[0019] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects:

[0020] By using the one-way valve, cryogenic liquid pressurizing system and cryogenic liquid pressurizing assembly of the present invention, during the return process, the one-way valve opens with the help of negative pressure and the elastic force of the spring on the valve core, thereby reducing the difficulty of opening the one-way valve and avoiding the situation where the one-way valve is difficult to open. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a one-way valve according to an embodiment of the present invention;

[0022] Figure 2for Figure 1 A top view of a valve seat of the one-way valve shown;

[0023] Figure 3 A schematic diagram of a cryogenic liquid pressurizing system according to an embodiment of the present invention when the one-way valve is in an open state;

[0024] Figure 4 for Figure 3 The schematic diagram of the cryogenic liquid pressurization system shown is when the one-way valve is in a closed state;

[0025] Figure 5 for Figure 3 A schematic diagram of a piston cylinder of a cryogenic liquid pressurization system is shown;

[0026] Figure 6 A schematic diagram of a cryogenic liquid pressurizing assembly according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] 1: valve seat; 101: liquid inlet; 2: valve core; 3: horizontal wing; 4: guide column; 5: spring; 6: piston cylinder; 7: piston; 8: transmission shaft; 9: liquid outlet pipe; 10: liquid outlet one-way valve; 11: drive assembly; 1101: hydraulic cylinder; 1102: hydraulic piston; 12: coaxial positioner; 13: sealing ring; 14: liquid storage tank; 15: first sealing sleeve; 16: second sealing sleeve; 17: flange. DETAILED DESCRIPTION

[0029] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, rather than indicating or implying that the device or component 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. Among them, the terms "first position" and "second position" are two different positions.

[0030] Figure 1 A schematic diagram of a one-way valve according to an embodiment of the present invention; Figure 2 for Figure 1 A top view of the valve seat of the one-way valve is shown. Figure 1 , Figure 2As shown, the one-way valve comprises a valve seat 1, a valve core 2, a plurality of horizontal wings 3 and a plurality of guide pillars 4. The valve seat 1 is provided with a liquid inlet 101, and a plurality of spring sheets 5 are fixed at intervals on the inner wall of the first end of the liquid inlet 101, and the plurality of spring sheets 5 extend obliquely away from the valve seat 1; the valve core 2 covers the liquid inlet 101 and abuts against the spring sheets 5; the plurality of horizontal wings 3 are respectively connected to the circumference of the valve core 2; the plurality of guide pillars 4 correspond to the plurality of horizontal wings 3 one by one, one guide pillar 4 passes through one horizontal wing 3 and is fixedly connected to the valve seat 1, and the horizontal wings 3 are movably connected to the guide pillars 4.

[0031] When in use, the side surface of the valve seat 1 fixing the guide column 4 is connected to the piston cylinder 6, and the valve core 2, the horizontal wing 3 and the guide column 4 are covered in the piston cylinder 6, and the liquid inlet 101 is immersed in the cryogenic liquid. In the initial state, the valve core 2 abuts against each of the elastic sheets 5, so that each of the elastic sheets 5 is flattened, and the elastic force generated by the deformation of each of the elastic sheets 5 provides a reverse supporting force for the valve core 2, and the side surface of the valve core 2 facing the valve seat 1 is in contact with the side surface of the valve seat 1 facing the valve core 2, so as to achieve the blocking of the liquid inlet 101. During the return stroke, that is, when the piston 7 in the piston cylinder 6 is pulled upward with its back toward the valve core 2, a negative pressure is generated inside the piston cylinder 6 due to the internal and external pressure difference. Under the combined action of the negative pressure and the elastic force of the spring sheet 5, the valve core 2 moves toward the piston 7, thereby disengaging from the liquid inlet 101, and the low-temperature liquid enters the piston cylinder 6 through the liquid inlet 101; during the stroke stroke, that is, when the piston 7 in the piston cylinder 6 moves toward the valve core 2, the valve core 2 falls back toward the liquid inlet 101, and finally abuts against each of the spring sheets 5, re-covering the liquid inlet 101, and at the same time, the compressed high-pressure low-temperature liquid in the piston cylinder 6 is discharged through the liquid outlet pipe 9 connected to the piston cylinder 6. During the movement of the valve core 2 away from or toward the valve seat 1, due to the limiting effect of the cooperation between the horizontal wing 3 and the guide column 4, the valve core 2 can only move up and down along the extension direction of the guide column 4 without causing horizontal displacement. Therefore, when the valve core 2 falls back during the downward movement of the piston 7, it can accurately cover the liquid inlet 101.

[0032] With the one-way valve of the present invention, during the return stroke, the one-way valve opens with the help of negative pressure and the elastic force of the spring 5 on the valve core 2, thereby reducing the difficulty of opening the one-way valve and avoiding the situation where the one-way valve is difficult to open.

[0033] In this embodiment, if Figure 1 , Figure 2 As shown, the valve seat 1 is a cylinder, and the liquid inlet 101 is opened through the center of the valve seat 1. Figure 1Four spring sheets 5 are evenly fixed to the inner wall of the upper end of the liquid inlet 101 , each of the spring sheets 5 has a certain elasticity and extends upwardly and tilted toward each other. In the natural state, the end surface of the free end of the spring sheet 5 is higher than the surface height of the valve seat 1 . Figure 1 The valve core 2 is disposed on the upper surface of the valve seat 1, and the valve core 2 is made of stainless steel metal, and its cross section is larger than the cross section of the liquid inlet 101, so as to completely cover the liquid inlet 101. Figure 1 As shown, the cross-section of the valve core 2 is an ellipse as a whole, the upper surface is an arc, and the range of the lower surface corresponding to the liquid inlet 101 is an arc toward the liquid inlet 101, so that when covering the liquid inlet 101, the arc portion can fully abut against each of the elastic sheets 5, and each of the elastic sheets 5 is fully deformed after being squeezed, exerting sufficient elastic force on the valve core 2, and the range of the lower surface of the valve core 2 corresponding to the valve seat 1 is a plane, so that when covering the liquid inlet 101, after the elastic sheets 5 are squeezed and deformed, the plane portion can fully fit with the upper surface of the valve seat 1 to prevent leakage. The valve core 2 is evenly fixed with four horizontal wings 3 around its circumference, and accordingly, as shown in FIG. Figure 2 As shown, there are four guide posts 4, which correspond to the four horizontal wings 3 one by one, penetrate the horizontal wings 3, and are fixedly connected to the valve seat 1. According to the actual application, the shape and size of the valve seat 1, the shape and size of the valve core 2, the number of the springs 5 ​​and the connection position in the liquid inlet 101, the number of the horizontal wings 3 and the guide posts 4 and the specific connection positions can be adjusted, as long as the valve core 2 can squeeze each spring 5 and deform each spring 5 when covering the liquid inlet 101, so that the valve core 2 can fit with the surface of the valve seat 1 to prevent leakage, and at the same time, under the dual action of negative pressure and the elastic force of the spring 5, the valve core 2 can be separated from the liquid inlet 101 to realize the opening and closing of the one-way valve.

[0034] Optionally, the angle between the spring sheet 5 and the horizontal plane is 2-5°. Setting the angle between the spring sheet 5 and the horizontal plane within this range allows the spring sheet 5 to be fully squeezed and deformed by the valve core 2 and to exert sufficient elastic force on the valve core 2.

[0035] According to actual application conditions, the angle between the spring piece 5 and the horizontal plane can be set to different angles such as 2°, 3°, 5°, etc.

[0036] Optionally, the inner wall diameter of the first end of the liquid inlet 101 is larger than the inner wall diameter of the second end opposite to the first end. With this arrangement, the cryogenic liquid entering through the second end can quickly enter and fill when flowing through the first end by virtue of the change in inner diameter.

[0037] In this embodiment, if Figure 1 As shown, the cross section is larger within about one-third of the height of the upper end of the liquid inlet 101, and smaller within about two-thirds of the height of the lower end, and the intersection surface of the cross-sectional diameter change is set to a gentle arc surface to guide the rapid filling of cryogenic liquid.

[0038] Optionally, the spring piece 5 is integrally formed with the valve seat 1. The integral forming process ensures the overall structural strength of the one-way valve and simplifies the connection process between the spring piece 5 and the valve seat 1, which is conducive to improving the manufacturing efficiency.

[0039] Figure 3 A schematic diagram of a cryogenic liquid pressurizing system according to an embodiment of the present invention when the one-way valve is in an open state; Figure 4 for Figure 3 The schematic diagram of the cryogenic liquid pressurization system shown is when the one-way valve is in a closed state; Figure 5 for Figure 3 Schematic diagram of the piston cylinder of the cryogenic liquid pressurization system shown in FIG. Figure 3-Figure 5 As shown, the present invention also provides a low-temperature liquid pressurization system, comprising the one-way valve described in any of the above embodiments, and also comprising a piston cylinder 6, a piston 7 and a transmission shaft 8. A piston cavity is provided in the piston cylinder 6, and a liquid outlet connected to the piston cavity is provided through it, the liquid outlet is connected to a liquid outlet pipe 9, and a liquid outlet one-way valve 10 is provided in the liquid outlet pipe 9; the piston 7 is provided in the piston cavity and movably connected to the piston cavity; the transmission shaft 8 passes through the piston cylinder 6 and is connected to the piston 7; the end of the piston cylinder 6 facing away from the transmission shaft 8 is connected to the valve seat 1 of the one-way valve, and the valve core 2, the horizontal wing 3 and the guide column 4 of the one-way valve are covered in the accommodating cavity.

[0040] When in use, the liquid inlet 101 is immersed in the cryogenic liquid. In the initial state, the liquid outlet one-way valve 10 is closed, the valve core 2 abuts against each of the elastic sheets 5, so that each of the elastic sheets 5 is flattened, and the elastic force generated by the deformation of each of the elastic sheets 5 provides a reverse supporting force for the valve core 2, and the side surface of the valve core 2 facing the valve seat 1 is in contact with the side surface of the valve seat 1 facing the valve core 2, so as to achieve the blocking of the liquid inlet 101. During the return stroke, the transmission shaft 8 is driven to be pulled upward in the direction away from the piston cylinder 6, thereby driving the piston 7 connected thereto to move in the same direction. During the upward pulling of the piston 7, the piston cavity generates a negative pressure due to the internal and external pressure difference. Under the dual effects of the negative pressure and the elastic force of the elastic sheet 5 on the valve core 2, the valve core 2 moves along the guide column 4 toward the piston 7, thereby separating from the liquid inlet 101, and the liquid inlet 101 is released, and the cryogenic liquid enters the piston cavity through the liquid inlet 101. During the stroke, the transmission shaft 8 is driven in the reverse direction to move downward toward the valve core 2, thereby driving the piston 7 connected thereto to move in the same direction. During the downward movement of the piston 7, the cryogenic liquid in the piston chamber is compressed and pressurized. At the same time, the valve core 2 moves along the guide column 4 toward the liquid inlet 101, and finally re-blocks the liquid inlet 101. When the pressure in the piston chamber reaches the set pressure, the liquid outlet one-way valve 10 opens, and the pressurized cryogenic liquid is discharged to an external device, such as a vaporizer, through the liquid outlet pipe 9. After the pressurized cryogenic liquid is discharged, the transmission shaft 8 is driven again to pull upward away from the piston cylinder 6. During this process, the liquid outlet one-way valve 10 is closed, and the valve core 2 is separated from the liquid inlet 101 and opened. This reciprocating cycle is repeated to achieve a process of continuous pressurization and liquid delivery.

[0041] By using the cryogenic liquid boosting system of the present invention, during the return process, the one-way valve opens with the help of negative pressure and the elastic force of the spring 5 on the valve core 2, thereby reducing the difficulty of opening the one-way valve and avoiding the situation where the one-way valve is difficult to open.

[0042] like Figure 3-Figure 5As shown, in this embodiment, the lower end of the transmission shaft 8 passes through the piston cylinder 6 and is fixedly connected to the upper end of the piston 7. The liquid outlet passes through the left side wall of the bottom end of the piston cylinder 6 and is connected to the liquid outlet pipe 9. The lower end surface of the piston cylinder 6 is fixedly connected to the upper end surface of the valve seat 1. The opening of the lower end surface of the piston cylinder 6 is arranged corresponding to the liquid inlet 101, and the valve core 2, the horizontal wing 3 and the guide column 4 are contained in the accommodating cavity. In order to prevent pressure release and liquid leakage, at the position where the transmission shaft 8 passes through the piston cylinder 6, a first sealing sleeve 15 is circumferentially sleeved on the transmission shaft 8 to block the gap between the transmission shaft 8 and the piston cylinder 6 in the circumference, but does not affect the up and down reciprocating movement of the transmission shaft 8. According to the actual application situation, the sizes of the piston cylinder 6, the piston 7 and the transmission shaft 8 can be matched and adjusted, and the liquid outlet one-way valve 10 can adopt a one-way valve of any structural form, as long as the piston 7 is lifted during the return stroke and the low-temperature liquid is replenished in the piston chamber, the liquid outlet one-way valve 10 is in a closed state. During the stroke, the piston 7 compresses the low-temperature liquid in the piston chamber, and when the pressure reaches the set value, the liquid outlet one-way valve 10 can be opened.

[0043] Optionally, the cryogenic liquid pressurizing system further includes a driving assembly 11 , wherein the driving assembly 11 is drivingly connected to the transmission shaft 8 to drive the transmission shaft 8 to reciprocate along the piston cylinder 6 .

[0044] The drive assembly 11 can be any form of drive structure, such as motor drive, hydraulic drive, etc. In this embodiment, the drive assembly 11 adopts a hydraulic drive mode, such as Figure 1 , Figure 2 As shown, the driving assembly 11 includes a hydraulic cylinder 1101, a hydraulic piston 1102 is arranged in the hydraulic cylinder 1101, the upper end of the transmission shaft 8 passes through the hydraulic cylinder 1101 and is fixedly connected to the hydraulic piston 1102. Driven by an external hydraulic pump, the hydraulic piston 1102 moves up and down in the hydraulic cylinder 1101, thereby driving the transmission shaft 8 to move up and down. In order to prevent pressure release and liquid leakage, a second sealing sleeve 16 is sleeved on the circumference of the transmission shaft 8 at the position where the transmission shaft 8 passes through the hydraulic cylinder 1101, so as to block the gap between the circumference of the transmission shaft 8 and the hydraulic cylinder 1101, but does not affect the up and down reciprocating movement of the transmission shaft 8.

[0045] Optionally, the cryogenic liquid pressurizing system further comprises a coaxial positioner 12, wherein the coaxial positioner 12 is sleeved on the transmission shaft 8 and fixedly connected to the piston cylinder 6. This arrangement improves the stability of the transmission shaft 8 during movement.

[0046] like Figure 3 , Figure 4 As shown, in this embodiment, the coaxial positioner 12 is a hollow cylinder, the inner wall diameter of which matches the outer wall diameter of the transmission shaft 8. The transmission shaft 8 is inserted into the coaxial positioner 12, and the two are clearance-matched, so that the transmission shaft 8 can both reciprocate along the coaxial positioner 12 and be limited by the coaxial positioner 12 without excessive lateral displacement. The lower end of the coaxial positioner 12 is fixedly connected to the top end of the piston cylinder 6, and the two are coaxially arranged, and the coaxiality is less than 0.003mm.

[0047] like Figure 3 , Figure 4 As shown, in order to facilitate fixing the low-temperature liquid boosting system to other devices, a flange 17 is fixed to the upper end of the coaxial positioner 12, and the hydraulic cylinder 1101 is fixed to the upper end of the flange 17. The transmission shaft 8 passes through the flange 17 and the coaxial positioner 12 in sequence and can move up and down along the two.

[0048] Optionally, the inner diameter of the piston cylinder 6 at one end facing the one-way valve gradually decreases in the direction toward the one-way valve; the outer diameter of the piston 7 at one end facing the one-way valve gradually decreases in the direction toward the one-way valve. This arrangement allows the cryogenic liquid entering the piston cavity to quickly fill the piston cavity, and allows the piston 7 to be uniformly stressed as a whole, thereby extending the service life of the piston 7.

[0049] like Figure 5 As shown, in this embodiment, the upper end of the piston cavity is set as a cylindrical structure, and the lower end is set as a conical structure. Correspondingly, the upper end of the piston 7 is set as a matching cylindrical structure, and the lower end is set as a matching conical structure. In the initial stage of low-temperature liquid pressurization, the piston 7 moves downward in the piston cavity of the cylindrical part. During this process, the outer wall of the cylindrical part of the piston 7 contacts the inner wall of the cylindrical part of the piston cavity, generating friction and sealing operations; when the piston 7 enters the conical part of the piston cavity, the outer wall of the conical part of the lower end of the piston 7 contacts the inner wall of the conical part of the lower end of the piston cavity, generating friction and sealing operations, so that the upper and lower parts of the piston 7 can generate friction and sealing operations, so that the piston 7 is evenly stressed and the service life of the piston 7 is extended. According to the actual application situation, the specific size of the variable diameter part in the piston cavity can be adjusted, and the size of the piston 7 is adjusted accordingly.

[0050] Optionally, the piston 7 is circumferentially sleeved with a sealing ring 13. This arrangement further seals the outer wall of the piston 7 and the inner wall of the piston chamber to prevent pressure release.

[0051] In this embodiment, if Figure 5As shown, the piston 7 includes an upper cylindrical portion and a lower conical portion, and a plurality of sealing rings 13 are arranged at intervals in the circumferential direction of the cylindrical and conical portions of the piston 7. According to actual application conditions, the number of the sealing rings 13 can be adjusted, for example, 3-10, and the specific sleeve positions of the sealing rings 13 in the circumferential direction of the piston 7 can also be adjusted.

[0052] Figure 6 FIG. 1 is a schematic diagram of a cryogenic liquid pressurizing assembly according to an embodiment of the present invention. Figure 6 As shown, optionally, the present invention also provides a cryogenic liquid pressurizing assembly, including a liquid storage tank 14, and also including the cryogenic liquid pressurizing system described in any of the above embodiments, wherein the piston cylinder 6 of the cryogenic liquid pressurizing system is fixed in the liquid storage tank 14.

[0053] By adopting the cryogenic liquid boosting assembly of the present invention, during the return process, the one-way valve opens with the help of negative pressure and the elastic force of the spring 5 on the valve core 2, thereby reducing the difficulty of opening the one-way valve and avoiding the situation where the one-way valve is difficult to open.

[0054] In this embodiment, the cryogenic liquid pressurizing system is connected to the liquid storage tank 14 by means of a flange 17. Figure 6 As shown, the one-way valve, the entire piston cylinder 6 and a portion of the transmission shaft 8 are immersed in the liquid storage tank 14 , the drive assembly 11 is exposed outside the liquid storage tank 14 , and the liquid outlet pipe 9 extends to the outside of the liquid storage tank 14 .

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A one-way valve, characterized in that: include: A valve seat, wherein a liquid inlet is formed through the valve seat, and a plurality of spring pieces are fixed to the inner wall of a first end of the liquid inlet at intervals, and the plurality of spring pieces extend obliquely away from the valve seat; A valve core, the valve core covers the liquid inlet and abuts against the elastic sheet; A plurality of horizontal wings, wherein the plurality of horizontal wings are respectively connected to the circumference of the valve core; A plurality of guide posts are provided, and the plurality of guide posts correspond to the plurality of horizontal wings one by one. One guide post passes through one horizontal wing and is fixedly connected to the valve seat. The horizontal wing is movably connected to the guide post.

2. The one-way valve according to claim 1, characterized in that: The angle between the spring sheet and the horizontal plane is 2-5°.

3. The one-way valve according to claim 1 or 2, characterized in that: The inner wall diameter of the first end of the liquid inlet is larger than the inner wall diameter of the second end opposite to the first end.

4. The one-way valve according to claim 1 or 2, characterized in that: The spring sheet and the valve seat are integrally formed.

5. The present invention also provides a cryogenic liquid pressurization system, characterized in that: The one-way valve according to any one of claims 1 to 4 further comprises: A piston cylinder, wherein a piston cavity is provided in the piston cylinder, and a liquid outlet communicating with the piston cavity is provided through the piston cylinder, the liquid outlet is connected to a liquid outlet pipe, and a liquid outlet one-way valve is provided in the liquid outlet pipe; A piston, the piston being disposed in the piston chamber and movably connected to the piston chamber; A transmission shaft, the transmission shaft passes through the piston cylinder and is connected to the piston; One end of the piston cylinder facing away from the transmission shaft is connected to the valve seat of the one-way valve, and the valve core, horizontal wings and guide column cover of the one-way valve are arranged in the accommodating cavity.

6. The cryogenic liquid pressurizing system according to claim 5, characterized in that: Also includes: A driving assembly is connected to the transmission shaft to drive the transmission shaft to move back and forth along the piston cylinder.

7. The cryogenic liquid pressurizing system according to claim 5 or 6, characterized in that: Also includes: A coaxial positioner is sleeved on the transmission shaft and fixedly connected to the piston cylinder.

8. The cryogenic liquid pressurizing system according to claim 5 or 6, characterized in that: The inner diameter of the piston cylinder at one end facing the one-way valve gradually decreases in the direction toward the one-way valve; The outer diameter of the piston at one end facing the one-way valve gradually decreases in a direction toward the one-way valve.

9. The cryogenic liquid pressurizing system according to claim 5 or 6, characterized in that: The piston is circumferentially sleeved with a sealing ring.

10. A cryogenic liquid pressurizing assembly, comprising a liquid storage tank, characterized in that: It also includes the cryogenic liquid pressurizing system according to any one of claims 5 to 9, wherein the piston cylinder of the cryogenic liquid pressurizing system is fixed in the liquid storage tank.

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