Manifold

Abstract

The present invention relates to a manifold comprising: a pipe; a nut member located at the outer peripheral surface of the pipe; and a manifold body including a port having a recessed shape extending into the manifold body from an outer surface of the manifold body, where the first portion of the nut member is inserted into the port, and the manifold body includes a locking portion configured to lock the first portion of the nut member into the port. The locking portion protrudes on the outer surface and engages with the second portion of the nut member to prevent the nut member inserted into the port from rotating and loosening.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0142289, filed on October 23, 2023, which is hereby incorporated by reference into this application. Technical Field

[0003] The present invention relates to a manifold. Background Art

[0004] Recently, awareness of the crisis of the environment and the depletion of petroleum resources has increased, and research and development of electric vehicles as environmentally friendly vehicles have attracted attention. Electric vehicles include plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell electric vehicles (FCEVs).

[0005] FCEVs may include a fuel cell stack that uses hydrogen to generate electricity and a hydrogen storage tank that stores the hydrogen.

[0006] FCEV basically requires a large-capacity hydrogen tank to increase the cruising range. The hydrogen tank has a cylindrical shape extending in the width direction of the vehicle to ensure a longer cruising range.

[0007] The hydrogen transferred from the hydrogen storage tank to the fuel cell stack is usually at a high pressure, so the FCEV includes a manifold for distributing the high-pressure hydrogen. The manifold may include a manifold body and piping connected to the manifold body, the manifold body including flow channels and ports for distributing fluids inside.

[0008] Since outflow of high-pressure hydrogen gas flowing through the manifold may cause a safety accident, a manifold having a more stable structure is required. Summary of the invention

[0009] The present invention relates to a manifold. Some embodiments of the present invention can solve the above-mentioned problems occurring in the prior art while maintaining the advantages achieved by the prior art.

[0010] One embodiment of the present invention may provide a manifold capable of improving airtightness between a pipe and a manifold body.

[0011] One embodiment of the present invention may provide a manifold capable of preventing a pipe inserted into a manifold body from being loosened.

[0012] The technical problems to be solved by some embodiments of the present invention are not limited to the above-mentioned problems, and those skilled in the art to which the present invention belongs will clearly understand solutions to other technical problems not mentioned herein by using the embodiments through the following description.

[0013] According to an embodiment of the present invention, a manifold comprises: a pipe; a nut member located at the outer peripheral surface of the pipe; and a manifold body, comprising a port having a recessed shape extending from the outer surface of the manifold body into the manifold body, wherein a first portion of the nut member is inserted into the port, and the manifold body comprises a locking portion protruding on the outer surface and engaging with a second portion of the nut member to prevent the nut member inserted into the port from rotating and loosening.

[0014] The locking portion includes a wedge-shaped piece protruding from the outer surface.

[0015] The wedge-shaped members are arranged along the circumferential direction of the pipe.

[0016] The first part of the nut member includes a nut fixing portion inserted into the port and fixed to the manifold body, wherein the second part of the nut member includes: a nut head located outside the port to face the locking portion, and a wedge protruding from the outer surface toward the nut head to fix the nut head.

[0017] The manifold body includes a discharge face defining a manifold flow path configured to discharge a fluid through the ports, and a guide face having a cross-sectional area that widens from the discharge face toward an outer side of the manifold body.

[0018] The pipe includes: a pipe body extending in a first direction in the pipe insertion port and including an outer peripheral surface of the pipe; and an inflow portion provided at one end of the pipe body and inserted into the port to engage the guide surface.

[0019] The inflow portion includes: an inflow surface formed to correspond to the guide surface; and a circumferential rib provided in a second direction to protrude toward the radially outer side of the pipe body, the second direction being opposite to the first direction.

[0020] The inflow portion includes a support surface extending to have a cross-sectional area widening in a first direction from an outer peripheral surface of the pipe body, and a circumferential surface recessed radially inwardly from the circumferential rib toward the pipe body to extend toward the support surface in a second direction.

[0021] The nut member includes: an inner circumferential surface supporting the outer circumferential surface of the piping body; a locking surface having a cross-sectional area widened in a first direction from the inner circumferential surface so that the locking surface is locked to the supporting surface; and a through surface extending from the locking surface along the first direction so that the inflow portion passes through the through surface.

[0022] The height (Nh) of the inner peripheral surface in the first direction is greater than the diameter (D) of the pipe.

[0023] The depth (Pd) of the port in the direction in which the nut member is inserted is greater than the diameter (D) of the pipe.

[0024] According to an embodiment of the present invention, a manifold includes: a manifold body, including a manifold flow path and a port formed in a recessed shape from the outer surface of the manifold body; a pipe, inserted into the port of the manifold body along a first direction and including a pipe flow path connected to the manifold flow path via the port fluid; and a nut member, inserted into the port and coupled to the manifold body while supporting the pipe, wherein, for a diameter (D) of the pipe and a depth (Pd) of the port in the first direction, a ratio (Pd / D) of the depth (Pd) of the port to the diameter (D) of the pipe is equal to or greater than 1.3.

[0025] The manifold body includes an inner circumferential surface defining a port, and a depth (Pd) of the port in the first direction may be a length of the inner circumferential surface in the first direction.

[0026] The manifold body includes: a discharge surface defining a manifold flow path; and a guide surface having a cross-sectional area widening from the discharge surface toward the outside of the manifold body.

[0027] The pipe includes: a pipe body extending in a first direction and including an outer peripheral surface; and an inflow portion provided at one end of the pipe body and inserted into the port toward the guide surface and protruding radially outward from the outer peripheral surface of the pipe body.

[0028] The nut member includes an inner circumferential surface configured to support the outer circumferential surface of the piping body, wherein, for a height (Nh) of the inner circumferential surface in a first direction and a diameter (D) of the piping, a ratio (Nh / D) of the height (Nh) of the inner circumferential surface to the diameter (D) of the piping is greater than or equal to 1.5.

[0029] According to an embodiment of the present invention, a manifold system includes: a manifold body having: a first outer surface; a port extending from the first outer surface into the manifold body, the port having an internal threaded portion with a port diameter; a guide surface extending from a bottom surface of the port into the manifold body, the guide surface having a first cone; a manifold flow path extending from the guide surface into the manifold body; and a locking portion protruding from the first outer surface, the locking portion having a group of wedge-shaped structural members arranged circumferentially adjacent to the port; a pipe, including: a pipe body having an outer peripheral surface and having a first outer diameter; a flange portion having a flange portion outer diameter greater than the first outer diameter; a flow portion at a distal end of the pipe at the flange portion, the flow portion having a second cone configured to match the first cone, the flow The moving part is widened to the outer diameter of the flange part, the flow part has a pipe hole outlet, and the pipe hole outlet is configured to be aligned with the manifold flow path when the flow part of the pipe is engaged with the guide surface of the manifold body, so that the pipe fluid is coupled to the manifold flow path; and a nut member, having an inner circumferential surface, which is configured to accommodate and support the outer circumferential surface of the pipe body therein, the nut member has an external threaded portion on the first nut outer surface, the external threaded portion is configured to be threadedly engaged with the internal threaded portion of the port, the nut member has a nut shoulder extending radially outward from the first nut outer surface, the nut shoulder has a shoulder nut width greater than the port diameter of the port, and the nut shoulder has a locking surface, and the locking surface is configured to face and engage the locking portion when the nut member is threadedly engaged with the port.

[0030] For the first outer diameter (D) of the pipe and the depth (Pd) of the port, a ratio (Pd / D) of the depth (Pd) of the port to the first outer diameter (D) of the pipe is equal to or greater than 1.3.

[0031] With respect to the height (Nh) of the inner circumferential surface of the nut member and the first outer diameter (D) of the pipe, a ratio (Nh / D) of the height (Nh) of the inner circumferential surface to the first outer diameter (D) is greater than or equal to 1.5.

[0032] The pipe has a circumferential rib extending radially outward from the flange portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features and advantages of the present invention will become more apparent through the following detailed description of specific embodiments in conjunction with the accompanying drawings, in which:

[0034] Figure 1 is a perspective view of a manifold according to an embodiment of the present invention;

[0035] Figure 2 A perspective view showing a port and a locking portion of a manifold according to an embodiment of the present invention;

[0036] Figure 3 is a side view of a manifold according to an embodiment of the present invention;

[0037] Figure 4 is a side cross-sectional view of a nut member and a pipe inserted into a manifold body according to an embodiment of the present invention;

[0038] Figure 5 is a bottom perspective view of a nut member according to an embodiment of the present invention;

[0039] Figure 6 is a side view of a nut member according to an embodiment of the present invention;

[0040] Figure 7 is a side cross-sectional view of a pipe inserted into a manifold body according to an embodiment of the present invention;

[0041] Figure 8 A schematic diagram showing that the binding force of the pipes according to an embodiment of the present invention is distributed into the manifold body; and

[0042] Fig. 9 is a cross-sectional view of a manifold according to an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 1: Manifold

[0045] 10: Manifold body

[0046] 10a: Distribution flow path

[0047] 11: Inflow connection part

[0048] 11a: Inflow hole

[0049] 12: Discharge surface

[0050] 12a: Manifold flow path

[0051] 13: Guide surface

[0052] 14: Port plane

[0053] 15: Inner circumference

[0054] 15a: Port

[0055] 15b: Inner guide surface

[0056] 16: Outer surface

[0057] 17: Locking part

[0058] 17a: Wedge

[0059] 20: Piping

[0060] 20a: Piping body

[0061] 21: Inner surface

[0062] 21a: Piping flow path

[0063] 22: Outer surface

[0064] 23: Inflow

[0065] 23a: Inflow surface

[0066] 23b: Circumferential rib

[0067] 23c: Circumferential surface

[0068] 23d: Support surface

[0069] 30: Nut component

[0070] 30a: Nut hole

[0071] 30b: Inner circumference

[0072] 30c: Locking surface

[0073] 30d: Through surface

[0074] 31: Nut head

[0075] 32: Nut fixing part

[0076] 33: Fixed part

[0077] 34: Insert surface

[0078] Pd: Depth

[0079] D: diameter

[0080] Lh: Height of inner surface

[0081] ML: Distance. DETAILED DESCRIPTION

[0082] Hereinafter, some exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that when assigning reference numerals to the components of each figure, the same or equivalent components may be represented by the same reference numerals even if they are shown on different drawings. In the present invention, detailed descriptions of well-known features or functions may be omitted to avoid unnecessarily obscuring the main points of the present invention.

[0083] When describing components of example embodiments of the present invention, terms such as "first", "second", "A", "B", "(a)", "(b)" may be used. Such terms may be used only to distinguish one component from another, and such terms do not necessarily limit the nature, order, or sequence of the constituent components. Unless otherwise defined, the terms used herein (including technical or scientific terms) may have the same meaning as commonly understood by technicians in the field to which the present invention belongs. Such terms (such as terms defined in commonly used dictionaries) may be interpreted as having the same meaning as the contextual meaning in the relevant technical field.

[0084] In the following, reference Figures 1 to 9 Exemplary embodiments of the present invention are described in detail.

[0085] Figure 1 is a side view of a manifold according to an embodiment of the present invention, Figure 2 A perspective view showing a port and a locking portion of a manifold according to an embodiment of the present invention, Figure 3 is a side view of a manifold according to an embodiment of the present invention, Figure 4 is a side cross-sectional view of a nut member and a pipe inserted into a manifold body according to an embodiment of the present invention.

[0086] refer to Figures 1 to 4 The manifold 1 may include a manifold body 10 including an inflow communication portion 11 having an inflow hole 11a for inflowing a fluid. Hereinafter, the fluid may be hydrogen, but the present invention is not limited thereto.

[0087] The manifold body 10 may include a distribution flow path 10a (see Fig. 9 ), and a manifold flow path 12a for discharging the fluid flowing in through the distribution flow path 10a.

[0088] The distribution flow path 10a may communicate with the inflow hole 11a so that the fluid flows through the inflow hole 11a, and may communicate with the manifold flow path 12a so that the fluid is discharged through the manifold flow path 12a.

[0089] The manifold body 10 may include a port 15a configured to exhaust fluid from the manifold flow path 12a.

[0090] The manifold 1 may include a pipe 20 inserted into each of the plurality of ports 15a to form a pipe flow path 21a connected to the manifold flow path 12a. When the plurality of pipes 20 are inserted into the manifold body 10, fluid flowing through the manifold flow path 12a disposed inside the manifold body 10 may be discharged through the pipe 20 or introduced through the pipe 20.

[0091] The manifold 1 may include a nut member 30 serving as a part for supporting the outer peripheral surface 22 of each pipe 20 , inserted into the port 15 a while supporting the pipe 20 , and coupled to the manifold body 10 .

[0092] The manifold body 10 may include a port 15a formed in a recessed shape from an outer surface 16 so that a nut member 30 is inserted into the port 15a, and a locking portion 17 formed on the outer surface 16 to prevent the nut member 30 inserted into the port 15a from rotating. The detailed structure of the locking portion 17 will be described below.

[0093] The manifold body 10 can be threadedly connected to the fixing surface 33 as the outer peripheral surface of the nut member 30 through the inner peripheral surface 15 defining the port 15a. The nut member 30 can be inserted into the port 15a while supporting the pipe 20 and coupled to the manifold body 10. Therefore, the nut member 30 can fix the pipe 20 to the port 15a.

[0094] In more detail, the manifold body 10 may include a discharge surface 12 extending toward the port 15a in a first direction (X direction) while defining a manifold flow path 12a, and a guide surface 13 having a cross-sectional area widened toward the port 15a from one end portion of the guide surface 13 adjacent to the port 15a of the discharge surface 12. In other words, the guide surface 13 may extend to have a cross-sectional area widened from the discharge surface 12 toward the outside of the manifold body.

[0095] The manifold body 10 may include: a port surface 14 extending from the guide surface 13 and extending radially outward along a first direction (X direction) from a virtual center line passing through the center of the manifold flow path 12a; an inner peripheral surface 15 extending from the port surface 14 along the first direction (X direction) to surround a port 15a; and an outer surface 16 connected to the inner peripheral surface 15.

[0096] The inner peripheral surface 15 may be formed to be provided with threads and correspond to the fixing surface 33 of the nut member 30. The inner peripheral guide surface 15b may be provided on a portion of the inner peripheral surface 15 adjacent to the outer surface 16. The inner peripheral guide surface 15b may be a surface that guides the nut member 30 to be introduced into the port 15a while being aligned.

[0097] The pipe 20 can be inserted into the port 15a in a direction opposite to the first direction (-X direction). The pipe 20 may include a pipe body 20a extending in the direction in which the pipe 20 is inserted into the port 15a and including an outer peripheral surface 22; and an inflow portion 23 provided at one end in the direction in which the pipe body 20a is inserted and inserted into the port 15a toward the guide surface 13.

[0098] The outer peripheral surface 22 of the pipe 20 may be the outer peripheral surface of the pipe body 20a, and the inner surface 21 of the pipe 20 may be the inner surface of the pipe body 20a and the inflow portion 23. When viewed in the direction in which the pipe 20 is inserted into the port 15a, the outer peripheral surface 22 of the pipe body 20a and the inner surface 21 of the pipe 20 may have a circular cross section. However, the present invention is not limited thereto. For example, when viewed in the direction in which the pipe 20 is inserted into the port 15a, the outer peripheral surface 22 of the pipe body 20a and the inner surface 21 of the pipe 20 may have a rectangular cross section.

[0099] The inflow portion 23 of the pipe 20 may protrude from the outer peripheral surface of the pipe body 20 a toward the radially outer side of the pipe body 20 a , and may be inserted into the port 15 a toward the guide surface 13 .

[0100] The inflow portion 23 of the pipe 20 may include an inflow surface 23a formed to correspond to the guide surface 13 to contact the guide surface 13, and a circumferential rib 23b extending from the inflow surface 23a in the first direction (X direction) while protruding toward the radially outer side of the pipe body 20a. The inflow surface 23a and the circumferential rib 23b may extend in the circumferential direction of the pipe 20.

[0101] In this example, the pipe 20 and the manifold body 10 are made of metal, and since there is metal-to-metal contact between the inflow portion 23 of the pipe 20 and the guide surface 13, a sealing structure is provided between the inflow portion 23 of the pipe 20 and the guide surface 13. In other words, the inflow surface 23a of the pipe 20 and the guide surface 13 of the manifold body 10 contact each other to cause plastic deformation. Therefore, a stronger tightening torque is applied to the manifold body 10, so that the manifold 1 ensures the tightening torque. Therefore, the airtightness between the pipe 20 and the manifold body 10 can be improved.

[0102] The inflow portion 23 of the pipe 20 may include a support surface 23d having a cross-sectional area that increases in a direction (-X direction) opposite to the first direction (X direction) from the outer peripheral surface 22 of the pipe body 20a, and a circumferential surface 23c that extends in a direction (-X direction) opposite to the first direction and is recessed from the circumferential rib 23b toward the radial inside of the pipe body 20a. In other words, the circumferential surface 23c may be recessed from the circumferential rib 23b toward the radial inside of the pipe body 20a to extend toward the support surface 23d in the first direction (X direction).

[0103] The support surface 23d and the circumferential surface 23c may protrude from the outer circumferential surface 22 of the pipe body 20a toward the radially outer side of the pipe body 20a to support the circumferential rib 23b.

[0104] The inflow portion 23 of the pipe 20 may be formed to be engaged by the nut member 30 when the nut member 30 is fixed to the manifold body 10 to prevent the pipe 20 from falling out of the port 15 a in the first direction (X direction).

[0105] The nut member 30 may include: an inner circumferential surface 30b, which supports the outer circumferential surface 22 of the piping body 20a; a locking surface 30c, which extends to have a cross-sectional area that increases from the inner circumferential surface 30b in the direction in which the nut member 30 is inserted into the port 15a, so that the supporting surface 23d of the piping 20 is locked to the locking surface 30c; and a through surface, which extends from the locking surface 30c in a direction (-X direction) opposite to the first direction (X direction) so that the inflow portion 23 passes through the through surface 30d.

[0106] Figure 5 FIG. 4 is a bottom perspective view of a nut member according to an embodiment of the present invention. Figure 6 FIG. 4 is a side view of a nut member according to an embodiment of the present invention.

[0107] refer to Figure 5 and 6 The nut member 30 may include: a nut fixing portion 32, which is inserted into the port 15a (see Figure 4 ) and fixed to the manifold body 10; and a nut head 31, located on the outside of the port 15a to face the locking portion 17.

[0108] The nut member 30 may include a nut hole 30 a provided inside the nut head 31 and the nut fixing portion 32 such that the pipe body 20 a is inserted into the nut hole 30 a .

[0109] The nut fixing portion 32 may include a fixing surface 33 extending in the circumferential direction and provided with threads corresponding to the inner circumferential surface 15 of the port 15 a , and an insertion surface 34 inserted into the port 15 a to face the port surface 14 .

[0110] Figure 7 is a side cross-sectional view of a pipe inserted into a manifold body according to an embodiment of the present invention, Figure 8 A schematic diagram showing that the binding force of the pipe according to an embodiment of the present invention is distributed to the manifold body, Fig. 9 is a cross-sectional view of a manifold according to an embodiment of the present invention.

[0111] refer to Figure 2 as well as Figures 7 to 9 In the structure of the manifold 1 according to one embodiment of the present invention, as described above, the pipe 20 and the nut member 30 are inserted into the port 15a, and the nut member 30 is coupled to the manifold body 10, thereby preventing the pipe 20 from falling off from the port 15a, thereby achieving more stable support.

[0112] In this structure, the nut member 30 and the pipe 20 are inserted into the port 15a. Therefore, when compared with the structure in which the pipe 20 is coupled outside the port 15a, the productivity of the manifold 1 can be improved because the pipe 20 and the nut member 30 can be guided to the insertion position in the port 15a.

[0113] The bonding force between the manifold body 10 , the pipe 20 , and the nut member 30 of the manifold 1 is important in terms of the structural stability of the manifold 1 .

[0114] For example, the manifold 1 may be a component installed inside a vehicle to distribute hydrogen from a hydrogen storage tank (not shown) or to supply hydrogen to the hydrogen storage tank.

[0115] In order for the manifold 1 to distribute high-pressure fluid, such as hydrogen, which can increase up to 1,050 bar, it is necessary for the manifold body 10 and the pipe 20 to have airtight properties. Since the manifold 1 is installed in the vehicle interior environment, a structure that supports a higher tightening torque is required.

[0116] When the port 15a of the manifold body 10 is neither formed to protrude from the outer surface 16 nor the nut member 30 is inserted into the port 15a, the outer diameter of the port 15a will change due to repeated combination between the piping 20 and the nut member 30 and the manifold body 10, which will make it relatively difficult to assemble the manifold body 10, the piping 20 and the nut member 30, thereby reducing durability and usability.

[0117] To solve such problems, according to the present invention, a structure may be provided in which a port 15a formed in a recessed shape from the outer surface 16 of the manifold body 10 may be provided, and when the pipe 20 is inserted toward the port 15a, the position of the pipe 20 is fixed by the nut member 30.

[0118] In order to more stably support the pipe 20 to the port 15a, the depth 'Pd' of the port 15a in the direction in which the nut member 30 is inserted may be set to be greater than the diameter 'D' of the pipe 20. More specifically, the ratio 'Pd / D' of the depth 'Pd' of the port 15a in the first direction (X direction) to the diameter 'D' of the pipe 20 may be greater than or equal to 1.3.

[0119] The depth 'Pd' of the port 15a in the first direction (X direction) may be the height of the inner circumferential surface 15 in the first direction (X direction) of the manifold body 10. When the depth 'Pd' of the port 15a in the first direction (X direction) is greater than or equal to 1.3 times the diameter 'D' of the pipe 20, the pipe 20 inserted into the port 15a may be more stably coupled to the manifold body 10 while being supported by the nut member 30.

[0120] According to this structure, when installed in the vehicle interior, even at about 40N ·m repeated tightening torque environment, it is also possible to prevent the nut member 30 inserted into the port 15a and the structure of the pipe 20 from being deformed. In this case, 40N can be applied. · m tightening torque, this is because a more stringent environment is required during driving, even at a fluid pressure of 700 bar, only 30N is required · m to prevent the fluid from flowing out through the space between the manifold body 10 and the pipe 20.

[0121] In addition, in order to make the nut member 30 support the pipe 20 more stably, the height 'Nh' of the inner circumferential surface 30b in the direction in which the nut member 30 is inserted into the port 15a may be greater than the diameter D of the pipe 20. In more detail, the ratio 'Nh / D' of the height Nh of the inner circumferential surface 30b in the direction in which the nut member 30 is inserted into the port 15a may be equal to or greater than 1.5.

[0122] The height Nh of the inner circumferential surface 30b in the direction in which the nut member 30 is inserted into the port 15a may refer to the contact height between the nut member 30 and the pipe body 20a. When the height Nh of the inner circumferential surface 30b in the direction opposite to the first direction (-X direction) is equal to or greater than 1.5 times the diameter D of the pipe 20, the pipe 20 inserted into the port 15a is supported by the nut member 30, thereby maintaining a more stable combination.

[0123] Based on the above principle, according to the embodiment of the present invention, since the port 15a is formed to be recessed from the outer surface 16 of the manifold body 10, and the structures of the nut member 30 and the pipe 20 inserted into the port 15a are more stably combined with each other to improve the durability of the manifold 1. Therefore, even in the case of a stronger tightening torque, the components of the manifold 1 can be prevented from being disassembled.

[0124] Along with this structure, a locking portion 17 including a wedge 17a protruding from the outer surface 16 may be formed on the outer surface of the manifold body 10. The locking portion 17 may be formed on the outer surface 16 to surround each port 15a. In a state where the pipe 20 is inserted into the port 15a, the wedge 17a may be arranged in the circumferential direction of the pipe 20.

[0125] The wedge 17a may protrude from the outer surface 16 toward the nut head 31 to fix the nut head 31 (see Figure 5 Since the wedge-shaped member 17a can be formed to be locked on the bottom surface of the nut head 31, the nut head 31 locked on the wedge-shaped member 17a can be prevented from rotating around the center of the nut hole 30a.

[0126] According to this structure, the opposite end of the piping body 20a can move relatively freely compared to the inlet portion 23, as long as the inlet portion 23 provided at one end of the piping body 20a is fixed to the port 15a of the manifold body 10, and the opposite end of the piping body 20a is not supported by an additional component.

[0127] Specifically, in a driving environment, a portion of the pipe 20 that is closer to the opposite end of the pipe body 20a rather than the inflow portion 23 may move in a second direction (Y direction) or a third direction (Z direction) perpendicular to the first direction (-X direction), or may rotate around the first direction (-X direction).

[0128] In this case, when the pipe 20 moves freely, that is, the pipe 20 or the nut member 30 is affected by an external force, the inflow portion 23 can be separated from the guide surface 13. Therefore, the fluid containing high-pressure hydrogen gas can flow out of the port 15a through the manifold flow path 12a of the manifold body 10, through the space between the guide surface 13 and the inflow surface 23a, and thus may cause a safety accident.

[0129] In order to prevent this situation, a wedge 17a is provided to be locked by the bottom surface of the nut head 31, and the nut head 31 can be prevented from rotating by using the friction force generated between the wedge 17a and the bottom surface of the nut head 31, thereby preventing the nut member 30 and the pipe 20 supported by the nut member 30 from loosening.

[0130] Through the above structure, such as Figure 8 As shown, the axial force can be transmitted to the manifold body 10 along the longitudinal direction of the pipe 20. In more detail, when the pipe 20 is inserted into the port 15a, a part of the axial force received through the inflow portion 23 can be transmitted to the manifold body 10 through the guide surface 13, or transmitted to the manifold body 10 through the nut member 30 on the radially outer side of the inflow portion 23. Therefore, the axial force of the pipe 20 can be uniformly transmitted radially to the outside of the pipe 20. Therefore, the pipe 20 can be supported more stably. Therefore, the structural stability of the present invention can be verified.

[0131] like Fig. 9 As shown, compared with a structure in which the ports 15a of the manifold body 10 are disposed outside the manifold body 10 and inserted, through the structure according to the embodiment of the present invention, the distance ML between a pair of ports 15a facing each other in opposite directions is relatively short.

[0132] Due to the above structure, a process of drilling the inside of the manifold body 10 is required, wherein the length ML of the manifold flow path 12a corresponds to the distance ML between the pair of ports 15a facing each other. This process can improve productivity.

[0133] According to the embodiments of the present invention, the gas seal between the pipe and the manifold body can be improved, thereby preventing safety accidents.

[0134] According to the embodiments of the present invention, when the nut member and the pipe are inserted into the manifold body and assembled to the manifold body to form an assembled structure, the manifold body can be prevented from being deformed.

[0135] According to the embodiment of the present invention, since the locking portion is formed on the outer surface of the manifold body, the pipe and the nut member can be prevented from being loosened even during driving.

[0136] The above description shows some exemplary embodiments of the present invention, and various modifications and variations may be made by those skilled in the art without departing from the scope of the claims of the present invention.

[0137] Therefore, the exemplary embodiments of the present invention are provided to explain the spirit and scope of the present invention, but not necessarily to limit it, so that the spirit and scope of the present invention are not necessarily limited by the exemplary embodiments. The scope of the present invention can be interpreted based on the appended claims, and the technical ideas within the scope equivalent to the claims are also included in the scope of the present invention.

[0138] Although the present invention has been described above with reference to the exemplary embodiments and the accompanying drawings, the present invention is not limited thereto but various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the present invention as claimed in the following claims.

Claims

1. A manifold comprising: piping; A nut member, located at the outer peripheral surface of the pipe; as well as A manifold body comprises a port having a recessed shape extending from an outer surface of the manifold body into the manifold body, wherein a first portion of the nut member is inserted into the port, and the manifold body comprises a locking portion protruding on an outer surface and engaging with a second portion of the nut member to prevent the nut member inserted into the port from rotating and loosening.

2. The manifold according to claim 1, wherein: The locking portion includes a wedge-shaped piece protruding from the outer surface.

3. The manifold of claim 2, wherein: The wedge-shaped members are arranged along the circumferential direction of the pipe.

4. The manifold of claim 2, wherein: The first portion of the nut member includes a nut fixing portion inserted into the port and fixed to the manifold body, wherein the second portion of the nut member includes: a nut head located outside the port to face the locking portion, and Wherein, the wedge-shaped piece protrudes from the outer surface toward the nut head to fix the nut head.

5. The manifold of claim 1, wherein: The manifold body comprises: a discharge face defining a manifold flow path configured to discharge fluid through the ports; and The guide surface has a cross-sectional area that widens from the discharge surface toward the outside of the manifold body.

6. The manifold of claim 5, wherein: The piping includes: a pipe body extending in a first direction in which the pipe is inserted into the port and including an outer peripheral surface of the pipe; and An inflow portion is provided at one end of the pipe body and is inserted into the port to engage the guide surface.

7. The manifold of claim 6, wherein: The inflow portion comprises: an inflow surface formed to correspond to the guide surface; and The circumferential rib is provided in a second direction to protrude toward the radially outer side of the pipe body, and the second direction is opposite to the first direction.

8. The manifold of claim 7, wherein: The inflow portion comprises: a support surface extending to have a cross-sectional area that widens in the first direction from the outer peripheral surface of the pipe body; and A circumferential surface is recessed radially inward from the circumferential rib toward the pipe body to extend toward the support surface along the second direction.

9. The manifold of claim 8, wherein: The nut member comprises: An inner peripheral surface supporting the outer peripheral surface of the pipe body; a locking surface having a cross-sectional area widening from the inner peripheral surface in the first direction so that the locking surface is locked to the supporting surface; and A through surface extends from the locking surface along the first direction, so that the inflow portion passes through the through surface.

10. The manifold of claim 9, wherein: A height (Nh) of the inner peripheral surface in the first direction is greater than a diameter (D) of the pipe.

11. The manifold of claim 1 , wherein: The depth (Pd) of the port in the direction in which the nut member is inserted is greater than the diameter (D) of the pipe.

12. A manifold comprising: a manifold body including a manifold flow path and a port formed in a recessed shape from an outer surface of the manifold body; a tubing inserted into a port of the manifold body in a first direction and comprising a tubing flow path fluidly connected to the manifold flow path via the port; as well as a nut member inserted into the port and coupled to the manifold body while supporting the pipe, Among them, for the diameter (D) of the piping and the depth (Pd) of the port in the first direction, a ratio (Pd / D) of the depth (Pd) of the port to the diameter (D) of the piping is equal to or greater than 1.

3.

13. The manifold of claim 12, wherein: The manifold body includes an inner circumferential surface defining the port, and wherein a depth (Pd) of the port in the first direction is a length of the inner circumferential surface in the first direction.

14. The manifold of claim 12, wherein: The manifold body comprises: a discharge face defining the manifold flow path; and The guide surface has a cross-sectional area that widens from the discharge surface toward the outside of the manifold body.

15. The manifold of claim 14, wherein: The piping includes: a pipe body extending along the first direction and comprising an outer peripheral surface; and An inflow portion is provided at one end portion of the pipe body and is inserted into the port toward the guide surface, and the inflow portion protrudes radially outward from the outer peripheral surface of the pipe body.

16. The manifold of claim 15, wherein: The nut member includes an inner circumferential surface, which is configured to support the outer circumferential surface of the piping body, and wherein, for the height (Nh) of the inner circumferential surface in the first direction and the diameter (D) of the piping, a ratio (Nh / D) of the height (Nh) of the inner circumferential surface to the diameter (D) of the piping is greater than or equal to 1.

5.

17. A manifold system comprising: a manifold body having: a first outer surface; a port extending from the first outer surface into the manifold body, the port having an internally threaded portion with a port diameter; A guide surface extending from a bottom surface of the port to the manifold body, the guide surface having a first conical shape; a manifold flow path extending from the guide surface to the manifold body; and a locking portion protruding from the first outer surface, the locking portion having a set of wedge-shaped structures arranged circumferentially adjacent to the port; A pipe, comprising: a pipe body having an outer peripheral surface and having a first outer diameter; a flange portion having a flange portion outer diameter greater than the first outer diameter; a flow portion located at a distal end of the pipe at the flange portion, the flow portion having a second cone configured to match the first cone, the flow portion widening to the flange portion outer diameter, the flow portion having a pipe hole outlet, the pipe hole outlet being configured to align with the manifold flow path when the flow portion of the pipe engages with the guide surface of the manifold body, so that the pipe fluid is coupled to the manifold flow path; as well as A nut member having an inner circumferential surface configured to accommodate and support the outer circumferential surface of the pipe body therein, the nut member having an external threaded portion on a first nut outer surface, the external threaded portion configured to be threadedly engaged with the internal threaded portion of the port, the nut member having a nut shoulder extending radially outward from the first nut outer surface, the nut shoulder having a shoulder nut width greater than a port diameter of the port, the nut shoulder having a locking surface configured to face and engage the locking portion when the nut member is threadedly engaged with the port.

18. The system of claim 17, wherein: For the first outer diameter (D) of the pipe and the depth (Pd) of the port, a ratio (Pd / D) of the depth (Pd) of the port to the first outer diameter (D) of the pipe is equal to or greater than 1.

3.

19. The system of claim 18, wherein: With respect to a height (Nh) of an inner peripheral surface of the nut member and a first outer diameter (D) of the pipe, a ratio (Nh / D) of the height (Nh) of the inner peripheral surface to the first outer diameter (D) is greater than or equal to 1.

5.

20. The system of claim 19, wherein: The pipe has a circumferential rib extending radially outward from the flange portion.

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