Exhaust valve of hydraulic system of hydraulic drive type hydrogen compressor

Abstract

The utility model provides an exhaust valve of a hydraulic system of a hydraulic drive type hydrogen compressor, and belongs to the field of hydrogen compressors. The problems that a large compression space exists in the space, close to the piston direction, of the air valve and the cylinder head, and the clearance volume is affected are solved. The device comprises a valve sleeve which is fixed at an exhaust port of a cylinder head; the inner sleeve is arranged in the valve sleeve and can move in the axial direction in the valve sleeve; the locking sleeve is connected with the valve sleeve and is used for locking the inner sleeve; and the valve plate assembly is arranged in the inner sleeve and used for controlling exhaust. The device is mainly used for exhausting compressed hydrogen.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen compressors, and in particular relates to an exhaust valve for a hydraulic system of a liquid-driven hydrogen compressor. Background Technology

[0002] During the compression process of a hydrogen compressor, the size of the clearance volume is an important factor affecting the compression effect. The larger the clearance volume, the weaker the compression effect, the larger the compressed volume, and the lower the pressure. Factors affecting the clearance volume include the distance between the piston and the cylinder head, the space between the cylinder head valve and the piston, and the high-pressure gas remaining in the space after the exhaust formation ends, which will expand during the intake formation and affect the intake effect.

[0003] In summary, an exhaust valve for a hydraulic system of a liquid-driven hydrogen compressor is proposed. Utility Model Content

[0004] In view of this, the present invention aims to propose an exhaust valve for a hydraulic system of a liquid-driven hydrogen compressor, in order to solve the problem that there is a large compression space between the valve and the cylinder head in the direction near the piston, which affects the clearance volume.

[0005] To achieve the above objectives, this utility model adopts the following technical solution to provide an exhaust valve for a hydraulic system of a liquid-driven hydrogen compressor, comprising:

[0006] The valve sleeve is fixed at the exhaust port of the cylinder head;

[0007] An inner sleeve is disposed inside the valve sleeve and can move along the internal axis of the valve sleeve;

[0008] A locking sleeve, which is connected to the valve sleeve, is used to lock the inner sleeve;

[0009] A valve assembly, disposed inside the inner sleeve, is used to control exhaust.

[0010] Furthermore, the inner sleeve has a sliding column for connecting the valve plate assembly inside, and the outer side is in the shape of three steps, wherein the second step has a thread, the second step is threadedly connected to the valve sleeve, and the first step and the second step are in contact with the valve sleeve.

[0011] Furthermore, the sliding column has a smooth part on one side near the inner sleeve and a threaded part on the other side. The smooth part is slidably connected to the valve plate assembly, and the threaded part is threadedly connected to the limiting sleeve.

[0012] Furthermore, a first sealing ring is provided on the first step, which contacts the valve sleeve, and a second sealing ring is provided on the third step, which contacts the valve sleeve.

[0013] Furthermore, the diameter of the first step is smaller than the diameter of the third step.

[0014] Furthermore, the valve assembly includes a valve plate and a pressure cap, the valve plate slides along the smooth portion, one side of the valve plate contacts the air port on the inner sleeve, and the other side contacts the pressure cap.

[0015] Furthermore, a plurality of springs for pressing the valve plate are provided between the valve plate and the pressure plate.

[0016] Furthermore, the locking sleeve has threads on its outer side and is threaded to the inner side of the valve sleeve.

[0017] Furthermore, the outer side of the locking sleeve is provided with a conical surface, and a cavity is formed between the conical surface, the valve sleeve and the inner sleeve, and a sealing gasket is provided in the cavity.

[0018] Furthermore, the internal structure of the valve sleeve is configured to correspond to the external structure of the inner sleeve.

[0019] Beneficial effects:

[0020] By setting the valve sleeve and inner sleeve whose positions are relatively adjustable, the remaining space of the valve and cylinder head in the direction near the piston is changed, thereby changing the clearance volume and improving the compression effect. At the same time, the relative position of the inner sleeve and the valve sleeve is fixed by setting a locking sleeve to maintain the compression effect, and the gasket is pressed by the locking sleeve to further prevent gas leakage between the valve sleeve and the inner sleeve. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 This is a cross-sectional view of the exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to the present invention;

[0023] Figure 2 This is an exploded schematic diagram of the exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to the present invention;

[0024] Figure 3 This is a schematic diagram of the outlet side structure of the exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to the present invention;

[0025] Figure 4 This is a schematic diagram of the intake side of the exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to the present invention;

[0026] Figure 5This is a schematic diagram showing the connection between the exhaust valve and the cylinder head of the hydraulic system of the liquid-driven hydrogen compressor described in this utility model.

[0027] In the diagram: Valve sleeve 1; Inner sleeve 2; Sliding column 3; Valve plate 4; Pressure cap 5; Spring 6; Limit sleeve 7; Locking sleeve 8; First sealing ring 9; Second sealing ring 10; Sealing gasket 11; Cylinder head 12. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0029] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Specific implementation method one:

[0032] Referring to the accompanying drawings, this embodiment provides an exhaust valve for a hydraulic system of a liquid-driven hydrogen compressor, comprising:

[0033] Valve sleeve 1 is fixed at the exhaust port of the cylinder head. Valve sleeve 1 can be fixed at the exhaust port of the cylinder head by welding or by machining threads.

[0034] The inner sleeve 2 is disposed inside the valve sleeve 1 and can move along the internal axis of the valve sleeve 1. By adjusting the relative position of the inner sleeve 2 and the valve sleeve 1, the space between the inner sleeve 2 and the cylinder can be changed, reducing the space generated at the valve.

[0035] Locking sleeve 8 is connected to valve sleeve 1 and is used to lock inner sleeve 2. After the position of inner sleeve 2 is determined, locking sleeve 8 fixes inner sleeve 2 by threaded compression.

[0036] A valve assembly, disposed inside the inner sleeve 2, is used to control the exhaust. During the exhaust process, the valve assembly controls the exhaust pressure and exhaust time.

[0037] In this embodiment, the inner sleeve 2 has a sliding pin 3 inside for connecting the valve plate assembly, and the outer side is three-step shaped, wherein the second step has a thread and is threadedly connected to the valve sleeve 1, and the first and second steps are in contact with the valve sleeve 1. The sliding pin 3 is used to connect with the valve plate assembly and limit the movement position of the valve plate assembly, thereby matching the air port on the inner sleeve 2.

[0038] The outer side of the inner sleeve 2 is three-step. The first step has the smallest diameter and is slidably connected to the inner side of the valve sleeve 1. The second step has threads and is threadedly connected to the inner side of the valve sleeve 1. The inner sleeve 2 can be rotated to tighten towards the inner side of the valve body 1, thereby changing the volume occupied by the inner sleeve 2 in the compression space. The third step has the largest diameter and is slidably connected to the inner side of the valve body 1.

[0039] In this embodiment, the sliding column 3 has a smooth part on one side near the inner sleeve 2 and a threaded part on the other side. The smooth part is slidably connected to the valve plate assembly, and the threaded part is threadedly connected to the limiting sleeve 7.

[0040] The valve plate 4, which is slidably connected to the valve plate assembly on the smooth part, has a threaded part connected to the limiting sleeve 7, which limits the position of the pressure cover 5, that is, the maximum lifting position of the valve plate 4. The pressure cover 5 also compresses the spring 6 to change the exhaust pressure.

[0041] In this embodiment, a first sealing ring 9 is provided on the first step, and the first sealing ring 9 is in contact with the valve sleeve 1. A second sealing ring 10 is provided on the third step, and is in contact with the valve sleeve 1.

[0042] The first sealing ring 9 contacts the valve sleeve 1 and the first step respectively, and is used to prevent compressed gas from being discharged through the gap between the valve sleeve 1 and the inner sleeve 2, which would affect the compression effect. The second sealing ring 10 further seals the gas and reduces the possibility of leakage.

[0043] In this embodiment, the diameter of the first step is smaller than that of the third step. Because the first step is smaller, it is first inserted into the valve sleeve 1, and then the third step is tightened to thread the second step onto the valve body 1.

[0044] In this embodiment, the valve plate assembly includes a valve plate 4 and a pressure cap 5. The valve plate 4 slides along the smooth portion, with one side of the valve plate 4 contacting the air port on the inner sleeve 2 and the other side contacting the pressure cap 5. When the valve plate 4 is subjected to gas pressure, it moves towards the pressure cap 5, thereby opening the air port of the inner sleeve 2. Compressed hydrogen gas is discharged through the air port, passes through the interior of the inner sleeve 2, and then is discharged outwards. The pressure cap 5 restricts the maximum lifting position of the valve plate 4.

[0045] In this embodiment, a plurality of springs 6 are provided between the valve plate 4 and the pressure cap 5 for pressing the valve plate 4.

[0046] After the gas is discharged, the pressure on the valve plate 4 near the gas port decreases, and the spring 6 pushes the valve plate 4 to move towards the gas port, closing the gas port. By rotating the limit sleeve 7, the relative position of the pressure cap 5 and the slide column 3 can be adjusted, thereby changing the pressure of the pressure cap 5 on the spring 6, and thus changing the exhaust pressure.

[0047] In this embodiment, the locking sleeve 8 has threads on its outer side and is threadedly connected to the inner side of the valve sleeve 1.

[0048] The locking sleeve 8 is threadedly connected to the valve sleeve 1 and is pressed onto the inner sleeve 2, thereby locking the inner sleeve 2 to prevent the inner sleeve 2 from loosening due to vibration during gas compression, which would affect the already adjusted position.

[0049] In this embodiment, the outer side of the locking sleeve 8 is provided with a conical surface, and a cavity is formed between the conical surface, the valve sleeve 1 and the inner sleeve 2, and a sealing gasket 11 is provided in the cavity.

[0050] During the tightening process, the locking sleeve 8 compresses the sealing gasket 11, causing the sealing gasket 11 to be pressed laterally against the inner wall of the valve sleeve 1 and longitudinally against the inner sleeve 2, further forming a seal and preventing compressed gas leakage.

[0051] In this embodiment, the internal structure of the valve sleeve 1 is configured to correspond to the external structure of the inner sleeve 2.

[0052] The internal structure of the valve sleeve 1 corresponds to the three-stage steps of the inner sleeve 2. The position corresponding to the first stage step is a smooth cylindrical surface, which facilitates the sealing of the first sealing ring 9. The position corresponding to the second stage step is provided with threads, and the position corresponding to the third stage step is provided with a smooth cylindrical surface, which facilitates the sealing of the second sealing ring 10.

[0053] Working principle: First, fix the valve sleeve 1 to the exhaust port of the cylinder head 12 by welding. Place the first sealing ring 9 and the second sealing ring 10 on the inner sleeve 2, and then place the inner sleeve 2 into the valve sleeve 1, with the first step inserted first, followed by the third step. The second step is threadedly connected to the valve sleeve 1. After adjusting the position of the inner sleeve 2, place the sealing gasket 11, screw in the locking sleeve 8, and tighten the locking sleeve 8 to fully press it against the inner sleeve 2. Prevent the valve plate 4, spring, and pressure cap 5 from being moved. Tighten the limit sleeve 7 and adjust the position of the pressure cap 5.

[0054] By changing the axial relative position of the inner sleeve 2 and the valve sleeve 1, the volume of the inner sleeve 2 in the compression chamber can be adjusted, thereby changing the space generated by the relative position of the valve and the cylinder head.

[0055] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. An exhaust valve for a hydraulic system of a liquid-driven hydrogen compressor, characterized in that, include: Valve sleeve (1) is fixed at the exhaust port of the cylinder head; The inner sleeve (2) is disposed inside the valve sleeve (1) and can move along the internal axis of the valve sleeve (1); Locking sleeve (8), which is connected to the valve sleeve (1) and is used to lock the inner sleeve (2); A valve plate assembly is disposed inside the inner sleeve (2) for controlling exhaust.

2. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 1, characterized in that: The inner sleeve (2) has a sliding column (3) for connecting the valve plate assembly inside, and the outer side is three-step. The second step is threaded and is threaded to the valve sleeve (1). The first step and the second step are in contact with the valve sleeve (1).

3. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 2, characterized in that: The sliding column (3) has a smooth part on one side near the inner sleeve (2) and a threaded part on the other side. The smooth part is slidably connected to the valve plate assembly, and the threaded part is threadedly connected to the limiting sleeve (7).

4. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 3, characterized in that: A first sealing ring (9) is provided on the first step, and the first sealing ring (9) is in contact with the valve sleeve (1). A second sealing ring (10) is provided on the third step, and is in contact with the valve sleeve (1).

5. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 4, characterized in that: The diameter of the first step is smaller than the diameter of the third step.

6. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 3, characterized in that: The valve plate assembly includes a valve plate (4) and a pressure cap (5). The valve plate (4) slides along the smooth part. One side of the valve plate (4) contacts the air port on the inner sleeve (2), and the other side contacts the pressure cap (5).

7. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 6, characterized in that: A plurality of springs (6) for pressing the valve plate (4) are provided between the valve plate (4) and the pressure plate (5).

8. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 1, characterized in that: The locking sleeve (8) has threads on its outer side and is threaded to the inner side of the valve sleeve (1).

9. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 8, characterized in that: The locking sleeve (8) has a conical surface on its outer side, and a cavity is formed between the conical surface, the valve sleeve (1) and the inner sleeve (2), and a sealing gasket (11) is provided in the cavity.

10. The exhaust valve of the hydraulic system of a liquid-driven hydrogen compressor according to claim 1, characterized in that: The internal structure of the valve sleeve (1) is configured to correspond to the external structure of the inner sleeve (2).

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