Hydrogen piston compressor

Abstract

The invention provides a hydrogen piston compressor which is characterized in that a compression space is formed by a piston assembly, a wall body of a compression chamber and a bottom plate, and hydrogen is compressed in the compression space through movement of the piston assembly; and when hydrogen with different flows and pressures needs to be treated, different compression spaces are needed, at the moment, the base plate and the interior of the wall body can move relatively through the driving assembly, adjustment of the compression spaces is achieved so as to adapt to different flow or pressure requirements, and therefore the compression efficiency and the process level of the hydrogen are ensured. According to the hydrogen piston compressor, the technical problems that in the prior art, when hydrogen with different flows and pressures needs to be treated, flexibility is poor, if the flow or pressure requirement of the hydrogen is changed, a compression chamber of a hydrogen compressor cannot effectively adapt, the compression efficiency is reduced, and the process requirement cannot be met are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen compressors, and in particular relates to a hydrogen piston compressor. Background Art

[0002] As a clean energy, hydrogen is gradually becoming an important alternative to fossil fuels, especially in the fields of fuel cell vehicles, hydrogen power plants, chemical synthesis, etc. In the application of hydrogen, in order to increase storage density, meet application needs, and facilitate transportation, hydrogen compressors are generally used to compress hydrogen.

[0003] Existing hydrogen compressors generally compress hydrogen through a compression chamber and a piston to obtain required compressed hydrogen.

[0004] However, the compression chamber of existing hydrogen compressors is generally a fixed cavity structure. During use, when it is necessary to process hydrogen with different flow rates and pressures, the flexibility is poor. If the flow rate or pressure requirements of the hydrogen gas change, the compression chamber of the hydrogen compressor cannot effectively adapt, resulting in reduced compression efficiency and technical problems that cannot meet process requirements. Summary of the invention

[0005] In order to solve the technical problem in the background technology that the compression chamber of the existing hydrogen compressor is a fixed cavity structure, and has poor flexibility when it is necessary to process hydrogen with different flow rates and pressures during use, and if the flow rate or pressure demand of the hydrogen changes, the compression chamber of the hydrogen compressor cannot effectively adapt, resulting in reduced compression efficiency and failure to meet process requirements, the present invention provides a hydrogen piston compressor.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A hydrogen piston compressor, comprising: a compression chamber, a drive assembly and a piston assembly; the compression chamber comprises a wall body and a bottom plate, the wall body and the bottom plate enclose a cavity; the piston assembly is inserted into the cavity through the wall body portion; the piston assembly inserted into the cavity, the wall body and the bottom plate enclose a compression space; the drive assembly is arranged outside the compression chamber and fixedly connected to the bottom plate, and the drive assembly is used to drive the bottom plate and the wall body to move relative to each other.

[0008] Optionally, the driving assembly includes a driver, a connecting member and a locking member; the driver is arranged outside the compression chamber, and the driver is connected to the base plate through the connecting member; the locking member is arranged on the connecting member.

[0009] Optionally, the driver is a hydraulic driver or a drive motor.

[0010] Optionally, a sealing component is provided on the bottom plate, and the sealing component abuts against the wall.

[0011] Optionally, the piston assembly includes a piston valve, a piston rod and a piston driving member; the piston driving member is arranged outside the compression chamber, the piston valve is arranged in the cavity, and the piston valve is against the wall body; the piston valve, the wall body and the bottom plate are enclosed to form the compression space; the piston rod passes through the wall body and is respectively connected to the piston driving member and the piston valve.

[0012] Optionally, a sealing layer is provided between the piston valve and the wall body.

[0013] Optionally, an air inlet valve and an air outlet valve are further provided on the wall, and the air inlet valve and the air outlet valve are connected to the compression space.

[0014] Optionally, the air inlet valve and the air outlet valve are solenoid valves.

[0015] Optionally, the hydrogen piston compressor is also provided with a central control component and a detection component, the detection component is used to detect the temperature, pressure and flow of the hydrogen in the compression space, and transmit the temperature, pressure and flow of the hydrogen in the compression space to the central control component; the central control component is electrically connected to the piston assembly, the air inlet valve and the air outlet valve; the central control component is used to adjust the piston assembly, the air inlet valve and the air outlet valve according to the temperature, pressure and flow of the hydrogen in the compression space.

[0016] Optionally, the hydrogen piston compressor is based on the formula:

[0017]

[0018] W=∫PdV

[0019] Calculate the compression ratio η and power consumption W, where P out is the pressure of the outlet valve, P in is the pressure of the input valve; dV is the change in hydrogen volume during the compression process.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides a hydrogen piston compressor, which forms a compression space through a piston assembly and a wall and bottom plate of a compression chamber, and compresses hydrogen in the compression space through the piston assembly; and when it is necessary to process hydrogen with different flow rates and pressures, different compression spaces are required. At this time, the bottom plate and the inside of the wall can be relatively moved by a driving assembly to adjust the compression space to adapt to different flow rates or pressure requirements, thereby ensuring the compression efficiency and process level of hydrogen. The hydrogen piston compressor provided by the present invention solves the technical problems in the prior art that when it is necessary to process hydrogen with different flow rates and pressures, the flexibility is poor. If the flow rate or pressure requirement of hydrogen changes, the compression chamber of the hydrogen compressor cannot effectively adapt, resulting in reduced compression efficiency and failure to meet process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a hydrogen piston compressor in the present invention;

[0023] Figure 2 It is a further schematic diagram of the hydrogen piston compressor in the present invention.

[0024] Among them: 1. compression chamber; 11. wall; 12. bottom plate; 121. sealing assembly; 13. air inlet valve; 14. air outlet valve; 2. drive assembly; 21. driver; 22. connector; 23. locking member; 3. piston assembly; 31. piston valve; 32. piston rod; 33. piston drive member; 34. pressure relief device. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] See also Figure 1 to Figure 2 , shows a schematic diagram of a hydrogen piston compressor described in the present application, which includes a compression chamber 1, a drive assembly 2 and a piston assembly 3; the compression chamber 1 includes a wall body 11 and a bottom plate 12, and the wall body 11 and the bottom plate 12 are enclosed to form a cavity; the piston assembly 3 is partially inserted into the cavity through the wall body 11; the piston assembly 3 inserted into the cavity, the wall body 11 and the bottom plate 12 are enclosed to form a compression space; the drive assembly 2 is arranged outside the compression chamber 1 and is fixedly connected to the bottom plate 12, and the drive assembly 2 is used to drive the bottom plate 12 and the wall body 11 to move relative to each other.

[0033] In this embodiment, a compression space is formed by the piston assembly 3 and the wall 11 and bottom plate 12 of the compression chamber 1, and the piston assembly 3 is used to compress hydrogen in the compression space; and when it is necessary to process hydrogen with different flow rates and pressures, different compression spaces are required. At this time, the bottom plate 12 and the wall 11 can be relatively moved by the driving assembly 2 to adjust the compression space to adapt to different flow rates or pressure requirements, thereby ensuring the compression efficiency and process level of hydrogen. The hydrogen piston compressor provided by the present invention solves the problem that the prior art has poor flexibility when it is necessary to process hydrogen with different flow rates and pressures. If the flow rate or pressure requirement of hydrogen changes, the compression chamber of the hydrogen compressor cannot effectively adapt, resulting in reduced compression efficiency and failure to meet process requirements.

[0034] It should be noted that the wall body 11 in this embodiment includes a side wall and an upper wall, and the piston assembly 3 is inserted into the cavity through the upper wall.

[0035] Optionally, refer to Figure 2 The driving assembly 2 in the present invention includes a driver 21, a connecting member 22 and a locking member 23; the driver 21 is arranged outside the compression chamber 1, and the driver 21 is connected to the bottom plate 12 through the connecting member 22; the locking member 23 is arranged on the connecting member 22.

[0036] Furthermore, the locking member 23 in this embodiment may be an electrically controlled locking switch, a mechanical switch or the like.

[0037] Optionally, the driver 21 in the present invention is any one of a hydraulic driver and a drive motor.

[0038] Optionally, a sealing component 121 is disposed on the bottom plate 12 of the present invention, and the sealing component 121 abuts against the wall body 11 .

[0039] In this embodiment, a sealing component 121 is provided on the bottom plate 12 to abut against the wall body 11. The bottom plate 12 and the wall body 11 are sealed by the sealing component 121 to prevent gaps from being generated during the relative movement of the bottom plate 12 and the wall body 11, resulting in hydrogen leakage and affecting the compression efficiency.

[0040] Optionally, the piston assembly 3 in the present invention includes a piston valve 31, a piston rod 32 and a piston driving member 33; the piston driving member 33 is arranged outside the compression chamber 1, the piston valve 31 is arranged in the cavity, and the piston valve 31 is against the wall 11; the piston valve 31, the wall 11 and the bottom plate 12 are enclosed to form a compression space; the piston rod 32 passes through the wall 11 and is respectively connected to the piston driving member 33 and the piston valve 31.

[0041] In this embodiment, the piston driving member 33 and the piston valve 31 are connected by the piston rod 32. During use, the piston driving member 33 and the piston rod 32 drive the piston valve 31 to move in the compression chamber 1, thereby compressing the hydrogen in the compression chamber 1.

[0042] Optionally, a sealing layer is provided between the piston valve 31 and the wall body 11 in the present invention.

[0043] In this embodiment, a sealing layer is provided between the piston valve 31 and the wall body 11 to ensure the compression efficiency of hydrogen.

[0044] Optionally, an air inlet valve 13 and an air outlet valve 14 are further provided on the wall body 11 in the present invention, and the air inlet valve 13 and the air outlet valve 14 are connected to the compression space.

[0045] Optionally, the air inlet valve 13 and the air outlet valve 14 in the present invention are solenoid valves.

[0046] In this embodiment, hydrogen is input and output through the inlet valve 13 and the outlet valve 14. In particular, a solenoid valve is used, which has the advantages of being electrically controllable, having a fast reaction rate and high precision, and is convenient for precise control of hydrogen during the process of compressing hydrogen.

[0047] Furthermore, in the present invention, the side of the bottom plate 12 close to the piston valve 31 is a conical groove, and the side of the piston valve 31 close to the bottom plate 12 is a conical protrusion corresponding to the bottom plate 12 .

[0048] In this embodiment, the side of the bottom plate 12 close to the piston valve 31 is a conical groove, and the side of the piston valve 31 close to the bottom plate 12 is a conical protrusion corresponding to the bottom plate 12, so as to have a better guiding effect on the hydrogen during the compression process and improve the hydrogen compression efficiency.

[0049] Furthermore, a pressure relief device 34 is also provided on the piston valve 31 in the present invention.

[0050] In this embodiment, during use, when the pressure in the compression space exceeds the safety threshold, the pressure relief device 34 will open to discharge the hydrogen in the compression space to the side of the piston valve 31 away from the compression space to prevent safety hazards caused by excessive pressure in the compression space.

[0051] Optionally, the hydrogen piston compressor in the present invention is also provided with a central control component and a detection component, the detection component is used to detect the temperature, pressure and flow of hydrogen in the compression space, and transmit the temperature, pressure and flow of hydrogen in the compression space to the central control component; the central control component is electrically connected to the piston component 3, the intake valve 13 and the outlet valve 14; the central control component is used to adjust the piston component 3, the intake valve 13 and the outlet valve 14 according to the temperature, pressure and flow of hydrogen in the compression space.

[0052] Optionally, the hydrogen piston compressor in the present invention is based on the formula:

[0053]

[0054] W=∫PdV

[0055] Calculate the compression ratio η and power consumption W, where P out is the pressure of the outlet valve 14, P in is the pressure of the input valve 13; dV is the change in the volume of hydrogen during the compression process.

[0056] In this embodiment, by detecting the temperature, pressure and flow of hydrogen in the compression space and adjusting the piston assembly 3, the inlet valve 13 and the outlet valve 14, the hydrogen compressor is in the best condition to achieve the best energy utilization and the best operating state.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hydrogen piston compressor, characterized in that: The hydrogen piston compressor comprises a compression chamber (1), a drive assembly (2) and a piston assembly (3); The compression chamber (1) comprises a wall body and a bottom plate (12), wherein the wall body (11) and the bottom plate (12) enclose a cavity; The piston assembly (3) is partially inserted into the cavity through the wall (11); The piston assembly (3) inserted into the cavity, the wall body (11) and the bottom plate (12) enclose a compression space; The driving component (2) is arranged outside the compression chamber (1) and is fixedly connected to the bottom plate (2). The driving component (2) is used to drive the bottom plate (12) and the wall body (11) to move relative to each other.

2. The hydrogen piston compressor according to claim 1, characterized in that: The driving assembly (2) comprises a driver (21), a connecting member (22) and a locking member (23); The driver (21) is arranged outside the compression chamber (1), and the driver (21) is connected to the bottom plate (12) via the connecting member (22); The locking member (23) is arranged on the connecting member (22).

3. The hydrogen piston compressor according to claim 2, characterized in that: The driver (21) is any one of a hydraulic driver and a drive motor.

4. The hydrogen piston compressor according to claim 1, characterized in that: A sealing component (121) is provided on the bottom plate (12), and the sealing component (121) abuts against the wall body (11).

5. The hydrogen piston compressor according to claim 1, characterized in that: The piston assembly (3) comprises a piston valve (31), a piston rod (32) and a piston driving member (33); The piston driving member (33) is arranged outside the compression chamber (1), the piston valve (31) is arranged in the cavity, and the piston valve (31) abuts against the wall (11); The piston valve (31), the wall body (11) and the bottom plate (12) enclose the compression space; The piston rod (32) passes through the wall (11) and is respectively connected to the piston driving member (33) and the piston valve (31).

6. The hydrogen piston compressor according to claim 5, characterized in that: A sealing layer is provided between the piston valve (31) and the wall body (11).

7. The hydrogen piston compressor according to claim 5, characterized in that: An air inlet valve (13) and an air outlet valve (14) are also provided on the wall body (11), and the air inlet valve (13) and the air outlet valve (14) are connected to the compression space.

8. The hydrogen piston compressor according to claim 7, characterized in that: The air inlet valve (13) and the air outlet valve (14) are solenoid valves.

9. The hydrogen piston compressor according to claim 7, characterized in that: The hydrogen piston compressor is also provided with a central control component and a detection component, wherein the detection component is used to detect the temperature, pressure and flow rate of the hydrogen in the compression space, and transmit the temperature, pressure and flow rate of the hydrogen in the compression space to the central control component; The central control assembly is electrically connected to the piston assembly (3), the air inlet valve (13) and the air outlet valve (14); The central control component is used to adjust the piston component (3), the air inlet valve (13) and the air outlet valve (14) according to the temperature, pressure and flow rate of the hydrogen in the compression space.

10. The hydrogen piston compressor according to claim 9, characterized in that: The hydrogen piston compressor is based on the formula: W=∫PdV Calculate the compression ratio η and power consumption W, where P out is the pressure of the outlet valve (14), P in is the pressure of the input valve (13); dV is the change in the volume of hydrogen during the compression process.

Images