End plate for press machine, press machine and hydrogen production equipment

Abstract

According to the end plate for the press machine, the transverse main rib plates distributed in parallel in the transverse axis direction of the base plate and the longitudinal main rib plates distributed in the center area of the base plate in the longitudinal axis direction of the base plate are arranged on the base plate, so that the overall rigidity of the end plate can be greatly improved; therefore, deformation caused by expansion force brought by initial loading force and galvanic pile expansion can be effectively resisted, and the sealing safety of the electrolytic cell is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen production by water electrolysis, and in particular to an end plate for a press, a press, and a hydrogen production device. Background Technology

[0002] Currently, the mainstream locking methods for electrolytic cells are the pull rod type and the pressure type. Compared with the pull rod type electrolytic cell, which uses screws to lock all bipolar plates, resulting in inconvenient maintenance, the pressure type electrolytic cell has more advantages in terms of maintenance.

[0003] However, under pre-compression and fuel cell operation conditions, both external loads and internal loads within the fuel cell itself can generate significant deflection deformation of the end plates. Specifically, during the pre-load loading process of a pressure electrolyzer, the piston rod is pushed by a hydraulic or pneumatic cylinder, which in turn drives the end plates to compress the fuel cell. Ultimately, the load is borne by the end plates, and significant deflection deformation of the end plates will severely affect the sealing performance of the electrolyzer. Utility Model Content

[0004] The purpose of this invention is to provide an end plate for a press, a press, and a hydrogen production device to solve the technical problems in the prior art.

[0005] To achieve the above objectives, this application provides an end plate for a press, comprising:

[0006] substrate;

[0007] Multiple transverse main stiffeners are distributed parallel to the transverse axis of the substrate on the substrate and are fixedly connected to the substrate.

[0008] Multiple longitudinal main stiffeners are distributed along the longitudinal axis of the substrate in the central region of the substrate, and their bottom surfaces are fixedly connected to the substrate.

[0009] Multiple supporting stiffeners are distributed along the outer periphery of the substrate in the edge region of the substrate and located between any two transverse main stiffeners. The two end faces are fixedly connected to the ends of the two transverse main stiffeners, and the bottom surface is fixedly connected to the substrate.

[0010] Optionally, the end plate includes a movable end plate and a fixed end plate;

[0011] When the end plate is the movable end plate, the end plate also includes a connecting plate located in the central region of the substrate. One side of the connecting plate is fixedly connected to at least one of the plurality of transverse main stiffeners, and the other side is connected to the piston rod.

[0012] Optionally, the plurality of transverse main reinforcement plates include a first transverse main reinforcement plate and a second transverse main reinforcement plate;

[0013] The connecting plate includes a first edge region and a second edge region opposite to the first edge region; the first edge region is fixedly connected to a first target region in the first transverse main reinforcement plate, the first target region being a portion of the first transverse main reinforcement plate located in the central region; the second edge region is fixedly connected to a second target region in the second transverse main reinforcement plate, the second target region being a portion of the second transverse main reinforcement plate located in the central region.

[0014] Optionally, the plurality of longitudinal main reinforcement plates include a first longitudinal main reinforcement plate and a second longitudinal main reinforcement plate;

[0015] The connecting plate further includes a third edge region and a fourth edge region opposite to the third edge region; the third edge region is fixedly connected to the first longitudinal main stiffener plate, and the fourth edge region is fixedly connected to the second longitudinal main stiffener plate.

[0016] Optionally, the end plate further includes a plurality of oblique connecting stiffeners and a plurality of straight connecting stiffeners; the oblique connecting stiffeners are used to connect the connecting plate and the transverse main stiffeners; the straight connecting stiffeners are located in the central region of the base plate and are used to connect the connecting plate and the longitudinal main stiffeners; one side of the connecting plate is fixedly connected to at least one of the plurality of transverse main stiffeners through the oblique connecting stiffeners, and is fixedly connected to at least one of the plurality of longitudinal main stiffeners through the straight connecting stiffeners.

[0017] Optionally, the bottom surface of the straight connecting stiffener is fixedly connected to the first target area in the first transverse main stiffener, and the top surface is fixedly connected to the connecting plate;

[0018] The oblique connecting stiffener includes an oblique side region and two right-angled side regions;

[0019] One right-angled side region of the oblique connecting stiffener is fixedly connected to at least two of the plurality of transverse main stiffeners, and the other right-angled side region of the oblique connecting stiffener is fixedly connected to one side of the straight connecting stiffener.

[0020] Optionally, the end plate further includes a baffle;

[0021] The baffle is located between the transverse main stiffener, the longitudinal main stiffener, the supporting stiffener, the oblique connecting stiffener, or the straight connecting stiffener. One side of the baffle is fixedly connected to the transverse main stiffener and / or the supporting stiffener, and the other side is fixedly connected to the oblique connecting stiffener and / or the straight connecting stiffener.

[0022] Optionally, the end plate may further include a plurality of longitudinal secondary stiffening plates;

[0023] The longitudinal secondary stiffener is located between any two transverse main stiffeners, and its two end faces are fixedly connected to the two transverse main stiffeners respectively.

[0024] Optionally, the end plate may further include a plurality of transverse secondary stiffeners;

[0025] The transverse secondary stiffener is located between the longitudinal main stiffener and the target support stiffener, or between any two longitudinal main stiffeners;

[0026] The two ends of the transverse secondary stiffener are fixedly connected to the longitudinal main stiffener and the target support stiffener, respectively, or fixedly connected to two longitudinal main stiffeners; the target support stiffener is the support stiffener with the closest vertical distance to the longitudinal main stiffener among the plurality of support stiffeners.

[0027] On the other hand, embodiments of this application provide a press, including a base, a cylinder disposed on the base, a piston rod with one end located inside the cylinder and reciprocating within the cylinder, and the end plate described above.

[0028] In another aspect, embodiments of this application provide a hydrogen production device, including the end plate described above, or the press described above.

[0029] Compared with the prior art, this application provides an end plate for a press. By providing transverse main stiffeners that are parallel to the transverse axis of the substrate and longitudinal main stiffeners that are distributed in the central region of the substrate along the longitudinal axis of the substrate, the overall rigidity of the end plate can be greatly improved. This can effectively resist the deformation caused by the initial load force and the expansion force caused by the expansion of the fuel cell, and improve the sealing safety of the electrolytic cell. Attached Figure Description

[0030] Figure 1 This is a front view of an end plate for a press provided in an embodiment of this application;

[0031] Figure 2 This is a front view of the end plate with a connecting plate in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram showing the separation of the connecting plate and the transverse main stiffening plate provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram showing the separation of the connecting plate and the longitudinal main stiffening plate provided in an embodiment of this application;

[0034] Figure 5 This is one of the structural schematic diagrams of an end plate with oblique connecting stiffeners and straight connecting stiffeners provided in the embodiments of this application;

[0035] Figure 6This is a second schematic diagram of an end plate with oblique connecting stiffeners and straight connecting stiffeners provided in an embodiment of this application;

[0036] Figure 7a This is a schematic diagram of the structure corresponding to one of the hollowing methods provided in the embodiments of this application;

[0037] Figure 7b This is a schematic diagram of the structure corresponding to another hollowing method provided in the embodiments of this application;

[0038] Figure 8 This is a schematic diagram of the structure of an end plate with a baffle provided in an embodiment of this application;

[0039] Figure 9 This is a front view of an end plate with longitudinal secondary stiffeners provided in an embodiment of this application.

[0040] The reference numerals in the attached figures are explained as follows:

[0041] 100 - End plate; 101 - Base plate; 102 - Transverse main stiffener plate; 1021 - First transverse main stiffener plate; 1022 - Second transverse main stiffener plate; 103 - Longitudinal main stiffener plate; 1031 - First longitudinal main stiffener plate; 1032 - Second longitudinal main stiffener plate; 104 - Supporting stiffener plate; 105 - Connecting plate; 1051 - First edge region; 1052 - Second edge region; 1053 - Third edge region; 1054 - Fourth edge region; 106 - Diagonal connecting stiffener plate; 1061 - Diagonal edge region; 1062 - Right-angled edge region; 1063 - Another right-angled edge region; 107 - Straight connecting stiffener plate; 108 - Baffle plate; 109 - Longitudinal secondary stiffener plate; 110 - Transverse secondary stiffener plate. Detailed Implementation

[0042] To make the objectives, advantages, and features of this utility model clearer, the method proposed by this utility model will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to conveniently and clearly assist in illustrating the purpose of the embodiments of this utility model.

[0043] To facilitate understanding of this utility model, a more detailed description of it will be provided below with reference to the accompanying drawings and specific embodiments.

[0044] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0045] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0046] In the description of this application and the appended claims, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0048] like Figure 1 The image shown is a front view of an end plate for a press provided in an embodiment of this application. The end plate 100 includes a base plate 101, a plurality of transverse main stiffening plates 102, a plurality of longitudinal main stiffening plates 103, and a plurality of support stiffening plates 104.

[0049] Among them, multiple transverse main stiffeners 102 can be distributed parallel to the transverse axis of the substrate 101 on the substrate 101 and fixedly connected to the substrate 101.

[0050] Furthermore, the thickness of the transverse main stiffener plate near the center of the substrate 101 can be greater than the thickness of the transverse main stiffener plate away from the center of the substrate 101. This is because when the pressure electrolytic cell is initially loaded, the middle area of ​​the end plate should have greater rigidity to ensure that the load force is better transmitted to both sides while generating a small amount of deformation at that location, so that the sealing load force in the overall structure is more uniform.

[0051] Furthermore, this application does not specifically limit the distribution position of the transverse main stiffeners. However, considering the position of the sealing water line in the electrolytic cell, transverse main stiffeners can also be provided in the edge area of ​​the substrate. This can effectively improve the sealing stress of the sealing surface under the working state of the fuel cell.

[0052] Furthermore, multiple transverse main stiffeners can be evenly distributed on the substrate, so that both the edge and center areas of the substrate are equipped with transverse main stiffeners, which can better resist deformation caused by external loads.

[0053] This application does not specify the number of transverse main stiffeners; in actual implementation, the number of transverse main stiffeners can be adjusted according to the size of the substrate.

[0054] Each longitudinal main stiffener 103 can be distributed along the longitudinal axis of the substrate 101 in the central region of the substrate 101, and its bottom surface can be fixedly connected to the substrate 101.

[0055] Furthermore, the two end faces of the longitudinal main stiffener plate 103 can be fixedly connected to the transverse main stiffener plate located in the central region, or there can be a gap between the two end faces of the longitudinal main stiffener plate 103 and the transverse main stiffener plate located in the central region.

[0056] This application does not specify the number of longitudinal main stiffening plates 103. In specific implementation, the number of longitudinal main stiffening plates 103 can be adjusted according to the size of the central area of ​​the base plate 101.

[0057] Furthermore, this application does not specifically limit the shape of the longitudinal main stiffening plate 103, and it can be... Figure 1 The rectangular plate shape shown could also be an arc-shaped plate. Furthermore, the multiple longitudinal main stiffening plates 103 could also be unconnected, for example... Figure 1 The rectangular plate shapes shown are directly connected and distributed in parallel between two transverse main stiffening plates; or, the multiple longitudinal main stiffening plates 103 can be connected. For example, when the longitudinal main stiffening plate 103 is an arc-shaped plate, the multiple arc-shaped longitudinal main stiffening plates 103 can be enclosed to form a circle, a near circle, or an ellipse.

[0058] Each supporting stiffener 104 is distributed along the outer periphery of the base plate 101 in the edge region of the base plate 101 and is located between any two transverse main stiffeners. Its two end faces are fixedly connected to the ends of the two transverse main stiffeners respectively, and its bottom surface is fixedly connected to the base plate 101.

[0059] In this embodiment, the end plate may include a movable end plate and a fixed end plate. The movable end plate is the end plate closest to the cylinder in the press, which moves with the piston rod; the fixed end plate is the end plate not in the cylinder of the press.

[0060] Thus, by arranging multiple transverse and longitudinal main stiffeners on the substrate, the overall rigidity of the end plate can be greatly improved, thereby effectively resisting the deformation caused by the initial load force and the expansion force brought about by the expansion of the fuel cell, and improving the sealing safety of the electrolytic cell.

[0061] If the end plate is a movable end plate, the end plate 100 may also include a connecting plate 105.

[0062] like Figure 2The image shown is a front view of an end plate with a connecting plate in an embodiment of this application. The connecting plate 105 may be located in the central region of the base plate 101, with one side fixedly connected to at least one of the plurality of transverse main stiffeners 102, and / or fixedly connected to at least one of the plurality of longitudinal main stiffeners 103, and the other side connected to the piston rod.

[0063] It should be noted that, under the condition that the end plate is a fixed end plate, the end plate 100 may not have a connecting plate 105 in its structure.

[0064] By setting the connecting plate 105, the connection between the movable end plate and the piston rod can be facilitated and the connection strength between the two can be improved.

[0065] like Figure 3 The diagram shown is a schematic representation of the separation between the connecting plate and the transverse main stiffening plate provided in an embodiment of this application. The plurality of transverse main stiffening plates 102 may specifically include a first transverse main stiffening plate 1021 and a second transverse main stiffening plate 1022. Both the first transverse main stiffening plate 1021 and the second transverse main stiffening plate 1022 have a portion of their area located in the central region.

[0066] The connecting plate 105 may include a first edge region 1051 and a second edge region 1052, wherein the first edge region 1051 and the second edge region 1052 are disposed opposite to each other. The first edge region 1051 is adjacent to the first target region (i.e., the first target region in the first transverse main stiffener plate 1021) Figure 3 The area A shown in the figure is fixedly connected to the second edge area 1052 and the second target area (i.e., the second transverse main stiffener plate 1022). Figure 3 The area B shown is fixedly connected, wherein the first target area is the portion of the first transverse main stiffener 1021 located in the central area; and the second target area is the portion of the second transverse main stiffener 1022 located in the central area.

[0067] It should be noted that, in this embodiment, any transverse main stiffening plate 102 that overlaps with the central region can be fixedly connected to the connecting plate 105, and is not limited to this type of plate. Figure 2 or Figure 3 The first transverse main stiffener plate 1021 and the second transverse main stiffener plate 1022 are shown in the figure; the connecting plate 105 can have various shapes, such as circles, ellipses, rounded rectangles, etc., and is not limited to the rectangle shown in the figure.

[0068] Furthermore, such as Figure 4 The diagram shown is a schematic representation of the separation between the connecting plate and the longitudinal main stiffening plate provided in an embodiment of this application. The plurality of longitudinal main stiffening plates 103 may include a first longitudinal main stiffening plate 1031 and a second longitudinal main stiffening plate 1032.

[0069] The connecting plate 105 may also include a third edge region 1053 and a fourth edge region 1054, which are arranged opposite to each other. The third edge region 1053 is fixedly connected to the first longitudinal main stiffener plate 1031, and the fourth edge region 1054 is fixedly connected to the second longitudinal main stiffener plate 1032.

[0070] Among them, the first edge region 1051, the third edge region 1053, the second edge region 1052 and the fourth edge region 1054 can be connected end to end; in some other cases, the first edge region 1051, the third edge region 1053, the second edge region 1052 and the fourth edge region 1054 can also be not connected end to end, that is, there can be gaps between the first edge region 1051 and the third edge region 1053, between the third edge region 1053 and the second edge region 1052, between the second edge region 1052 and the fourth edge region 1054, and between the fourth edge region 1054 and the first edge region 1051.

[0071] It should be noted that whether the first edge region 1051, the third edge region 1053, the second edge region 1052, and the fourth edge region 1054 are connected end-to-end can be consistent with whether the two end faces of the longitudinal main reinforcement plate 103 are fixedly connected to the transverse main reinforcement plate located in the central region. That is, if the two end faces of the longitudinal main reinforcement plate 103 are fixedly connected to the transverse main reinforcement plate located in the central region, then the first edge region 1051, the third edge region 1053, the second edge region 1052, and the fourth edge region 1054 are connected end-to-end; if the two end faces of the longitudinal main reinforcement plate 103 are not fixedly connected to the transverse main reinforcement plate located in the central region, that is, there is a gap between the two end faces of the longitudinal main reinforcement plate 103 and the transverse main reinforcement plate located in the central region, then the first edge region 1051, the third edge region 1053, the second edge region 1052, and the fourth edge region 1054 may not be connected end-to-end.

[0072] Furthermore, when the connecting plate 105 is connected to the transverse main stiffening plate 102, in addition to the direct fixed connection described above, it can also be connected by diagonal connecting stiffening plates and straight connecting stiffening plates.

[0073] By using oblique connecting ribs and straight connecting ribs for connection, the load force can be transferred through the piston rod to the entire load application surface of the end plate, resulting in a better sealing effect of the electrolytic cell.

[0074] Specifically, such as Figure 5The diagram shown is a structural schematic of an end plate with oblique connecting stiffeners and straight connecting stiffeners according to an embodiment of this application. The end plate 100 may further include a plurality of oblique connecting stiffeners 106 and a plurality of straight connecting stiffeners 107, wherein the oblique connecting stiffeners 106 are used to connect the connecting plate 105 and the transverse main stiffener 102; the straight connecting stiffeners 107 are located in the central region of the base plate 101 and are used to connect the connecting plate 105 and the longitudinal main stiffener 103.

[0075] Specifically, one side of the connecting plate 105 is fixedly connected to at least one of the multiple transverse main stiffening plates 102 via an oblique connecting stiffening plate 106, and is fixedly connected to at least one of the multiple longitudinal main stiffening plates 103 via a straight connecting stiffening plate 107.

[0076] Furthermore, such as Figure 6 As shown, the bottom surface of the straight connecting stiffener 107 is fixedly connected to the first target area in the first transverse main stiffener 1021, and the top surface is fixedly connected to the connecting plate 105.

[0077] The oblique connecting stiffener 106 may include an oblique side region 1061 and two right-angled side regions. Among them, the right-angled side region 1062 of the oblique connecting stiffener 106 is fixedly connected to at least two of the multiple transverse main stiffeners 102, and the other right-angled side region 1063 of the oblique connecting stiffener 106 is fixedly connected to one side of the straight connecting stiffener 107.

[0078] In this embodiment, the specific shapes of the straight connecting stiffener 107 and the oblique connecting stiffener 106 are not limited.

[0079] Straight connecting stiffener 107 can be Figure 5 or Figure 6 The rectangular plate shape shown in the figure, or the straight connecting stiffener 107, can also be an arc-shaped plate.

[0080] Furthermore, the multiple straight-connecting stiffeners 107 can be connected, for example... Figure 5 or Figure 6 The multiple rectangular plate-shaped straight connecting stiffeners 107 shown in the figure can be enclosed to form a polygon. Alternatively, when the straight connecting stiffeners 107 are arc-shaped, the multiple arc-shaped straight connecting stiffeners 107 can be enclosed to form a circle, a near-circle, or an ellipse. The multiple straight connecting stiffeners 107 can also be unconnected, which is not specifically limited in this application.

[0081] In this embodiment, the shape of the straight connecting stiffeners 107 and their connection with each other can be consistent with the shape and connection of the longitudinal main stiffeners 103.

[0082] The diagonal connecting stiffener 106 can also be in various shapes, for example... Figure 5 or Figure 6The shape of the diagonal connecting stiffener 106 shown is triangular, but it can also be other shapes, and there is no specific limitation.

[0083] Furthermore, the interior of the diagonal connecting stiffener 106 can be either openwork or non-openwork. For example, Figure 5 or Figure 6 As shown, when the oblique connecting rib 106 is a triangular plate, the interior of the oblique connecting rib 106 can be non-perforated; or it can be perforated. Furthermore, this application does not specifically limit the shape, size, or number of the perforated areas. Figure 7a and 7b The diagram shown is a structural schematic diagram corresponding to two different hollowing methods provided in the embodiments of this application.

[0084] like Figure 8 The diagram shown is a structural schematic of an end plate with a baffle provided in an embodiment of this application. The end plate 100 includes a baffle 108, which can be located between a transverse main stiffener 102, a longitudinal main stiffener 103, a supporting stiffener 104, and an oblique connecting stiffener 106 or a straight connecting stiffener 107. One side of the baffle 108 is fixedly connected to the transverse main stiffener 102 and / or the supporting stiffener 104, and the other side is fixedly connected to the oblique connecting stiffener 106 and / or the straight connecting stiffener 107. In this case, the oblique connecting stiffener 106 and / or the straight connecting stiffener 107 are essentially fixedly connected to the transverse main stiffener 102 and / or the longitudinal main stiffener 103 through the baffle 108.

[0085] The structure of baffle 108 can cover the transverse main stiffening plate 102 and the longitudinal main stiffening plate 103, making the entire end plate look more aesthetically pleasing.

[0086] To increase the strength of the end plates, such as Figure 9 The image shown is a front view of an end plate with longitudinal secondary stiffeners provided in an embodiment of this application. The end plate 100 may also include a plurality of longitudinal secondary stiffeners 109, which may be located between any two transverse main stiffeners, with their end faces fixedly connected to the two transverse main stiffeners respectively.

[0087] Similarly, to increase the strength of the end plate, the end plate 100 may also include multiple transverse secondary stiffeners 110. The transverse secondary stiffeners 110 may be located between the longitudinal main stiffeners 103 and the target support stiffener, or between any two longitudinal main stiffeners 103. The two end faces of the transverse secondary stiffeners 110 are fixedly connected to the longitudinal main stiffeners 103 and the target support stiffener, respectively, or fixedly connected to two longitudinal main stiffeners 103, wherein the target support stiffener is the support stiffener 104 that is closest to the longitudinal main stiffeners 103 in perpendicular distance among the multiple support stiffeners 104.

[0088] This application also provides a hydraulic press, which includes a base, a cylinder, a piston rod, a fixed plate, and an end plate.

[0089] The cylinder body is mounted on the machine base. The cylinder body can include various types, such as hydraulic cylinders or pneumatic cylinders.

[0090] One end of the piston rod is located inside the cylinder and can be connected to the piston inside the cylinder, while the other end is located outside the cylinder. The piston rod can reciprocate along the axis of the cylinder.

[0091] The specific structure of the end plate has been described above and will not be repeated here.

[0092] This application also provides a hydrogen production device, which includes the end plate or press described above.

[0093] It should be noted that when this end plate is used in a hydrogen production device, considering the flow of alkali solution and gas, it may be necessary to provide corresponding alkali solution flow channel holes and gas flow channel holes on this end plate. Figure 5 and Figure 6 The circular holes located on the transverse main stiffener and / or base plate are actually alkaline solution flow channels or gas flow channels.

[0094] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An end plate for a press machine, characterized in that, The end plate comprises a movable end plate and a fixed end plate. When the end plate is the movable end plate, the end plate further comprises a connecting plate located in the central region of the substrate, one side of the connecting plate is fixedly connected with at least one of the plurality of transverse main rib plates, and the other side is connected with a piston rod. The plurality of transverse main rib plates comprises a first transverse main rib plate and a second transverse main rib plate. The connecting plate comprises a first edge region and a second edge region opposite to the first edge region; the first edge region is fixedly connected with a first target region in the first transverse main rib plate, and the first target region is a part of the first transverse main rib plate located in the central region; and the second edge region is fixedly connected with a second target region in the second transverse main rib plate, and the second target region is a part of the second transverse main rib plate located in the central region. The plurality of longitudinal main rib plates comprises a first longitudinal main rib plate and a second longitudinal main rib plate.

2. The end plate of claim 1, wherein The connecting plate further comprises a third edge region and a fourth edge region opposite to the third edge region; the third edge region is fixedly connected with the first longitudinal main rib plate, and the fourth edge region is fixedly connected with the second longitudinal main rib plate. The end plate further comprises a plurality of inclined connecting rib plates and a plurality of straight connecting rib plates; the inclined connecting rib plates are used for connecting the connecting plate and the transverse main rib plate; the straight connecting rib plates are located in the central region of the substrate and are used for connecting the connecting plate and the longitudinal main rib plate; one side of the connecting plate is fixedly connected with at least one of the plurality of transverse main rib plates through the inclined connecting rib plate, and is fixedly connected with at least one of the plurality of longitudinal main rib plates through the straight connecting rib plate.

3. The end plate of claim 2, wherein The bottom surface of the straight connecting rib plate is fixedly connected with the first target region in the first transverse main rib plate, and the top surface is fixedly connected with the connecting plate. The inclined connecting rib plate comprises an inclined edge region and two right-angled edge regions.

4. The end plate of claim 3, wherein One right-angled edge region of the inclined connecting rib plate is fixedly connected with at least two of the plurality of transverse main rib plates, and the other right-angled edge region of the inclined connecting rib plate is fixedly connected with one side surface of the straight connecting rib plate. The end plate further comprises a baffle plate.

5. The end plate of claim 3, wherein The baffle plate is located between the transverse main rib plate or the longitudinal main rib plate or the support rib plate and the inclined connecting rib plate or the straight connecting rib plate, one side of the baffle plate is fixedly connected with the transverse main rib plate and / or the support rib plate, and the other side is fixedly connected with the inclined connecting rib plate and / or the straight connecting rib plate.

6. The end plate of claim 5, wherein The end plate further comprises a plurality of longitudinal auxiliary rib plates. ​ ​ 7. The end plate of claim 5, wherein ​ ​ 8. The end plate of claim 1, wherein ​ The longitudinal sub-rib plate is located between any two transverse main rib plates, and two end surfaces are fixedly connected with the two transverse main rib plates respectively.

9. The end plate of claim 1, wherein The end plate further comprises a plurality of transverse sub-rib plates; The transverse sub-rib plate is located between the longitudinal main rib plate and a target support rib plate, or between any two longitudinal main rib plates; Two end surfaces of the transverse sub-rib plate are fixedly connected with the longitudinal main rib plate and the target support rib plate respectively, or with two longitudinal main rib plates respectively; the target support rib plate is a support rib plate closest to the longitudinal main rib plate in terms of perpendicular distance.

10. A press machine characterized by, A press machine comprising a frame, a cylinder body arranged on the frame, a piston rod located inside the cylinder body and performing reciprocating motion in the cylinder body, and an end plate according to any one of claims 1 to 8.

11. A hydrogen production apparatus, characterized by comprising: A press machine comprising an end plate according to any one of claims 1 to 8, or a press machine according to claim 9.

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