Hydrogenation pipe joint and hydrogenation assembly

Abstract

The utility model discloses a hydrogenation pipe joint and a hydrogenation assembly, the hydrogenation pipe joint comprises: a joint core, along a first direction, the joint core comprises a first part, a second part and a hydrogenation channel, the second part comprises a first connecting part and a second connecting part, the first connecting part comprises a first groove; the nut is connected with the first part and is used for being connected with an external hydrogenation gun; the sleeve is used for being arranged on the outer side of the second part in a sleeving mode, the outer side of the sleeve comprises an outer surface used for buckling and pressing, the sleeve further comprises a third connecting part corresponding to the first connecting part and a fourth connecting part corresponding to the second connecting part, and in the second direction, the inner diameter of the fourth connecting part is larger than the outer diameter of the second connecting part; when the sleeve and the joint core are located at the buckling position, the nut and the sleeve are arranged at an interval in the first direction; the first sealing ring is used for being arranged in the first groove in a sleeving mode. According to the utility model, the sealing effect of the joint buckling part in the hydrogen transmission process can be improved, and hydrogen is prevented from leaking and permeating at the joint buckling part.

Description

Technical Field

[0001] The utility model relates to the field of hydrogenation pipe joints, and particularly relates to a hydrogenation pipe joint and a hydrogenation assembly. Background Art

[0002] At present, for the pipeline of hydrogen transmission, a plastic resin hose is generally directly connected to a hydrogenation pipe joint. During the hydrogen transmission process, the hydrogen pressure may exceed 70 MPa and the temperature may be lower than -40 °C. Under such transmission conditions, there is a risk of hydrogen leakage in the plastic resin hose. When the plastic resin hose is bent, a restoring force against bending will be generated. Since the hydrogenation pipe joint is connected to a hydrogenation gun, if the restoring force of the plastic resin hose is too large, it will increase the operation difficulty for the operator to hang the hydrogenation gun on the hydrogenation machine. Moreover, when the restoring force of the plastic resin hose is too large, the hydrogenation gun is likely to fall off the hydrogenation gun seat, easily causing damage to the hydrogenation gun.

[0003] In addition, under high pressure and low temperature conditions, due to the lack or insufficiency of sealing measures in the current hydrogenation pipe joints, the sealing effect at the joint crimping during hydrogen transmission cannot be guaranteed, and hydrogen leakage still occurs at the joint. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem of hydrogen leakage during hydrogen transmission in the prior art. The utility model provides a hydrogenation pipe joint, which can improve the sealing effect at the joint crimping during hydrogen transmission, prevent hydrogen from leaking and permeating at the joint crimping. For hydrogen transmission conditions of 70 MPa and a temperature lower than -40 °C, and even for higher requirements, selecting a hose that cooperates with the hydrogenation pipe joint can achieve a better sealing effect during hydrogen transmission.

[0005] To solve the above technical problems, an embodiment of the present utility model discloses a hydrogenation pipe joint, which includes: a joint core. Along a first direction, the joint core includes a first part, a second part, and a hydrogenation channel. The second part includes a first connection part and a second connection part. The first connection part includes a first groove. Along the first direction, the hydrogenation channel penetrates through the first part and the second part; a nut, connected to the first part, and the nut is used to connect with an external hydrogenation gun; a sleeve, the sleeve is used to be sleeved outside the second part, the sleeve is a hollow structure, the outer side of the sleeve includes an outer surface for crimping, the sleeve further includes a third connection part corresponding to the first connection part and a fourth connection part corresponding to the second connection part. Along a second direction, the inner diameter of the fourth connection part is greater than the outer diameter of the second connection part. When the sleeve and the joint core are in a crimping position, along the first direction, the nut and the sleeve are arranged at intervals, and the second direction intersects with the first direction; a first sealing ring, the first sealing ring is used to be sleeved in the first groove.

[0006] By adopting the above technical solution, the first sealing ring is sleeved in the first groove. After the second part of the sleeve and the joint core are crimped, the first sealing ring is deformed and completely located in the first groove, ensuring the sealing effect of the first sealing ring and preventing hydrogen from leaking and permeating at the crimping part of the joint.

[0007] Since the connection between the sleeve and the joint core is formed by crimping with a crimping machine, after crimping, the sleeve will extend left and right, and the length of the sleeve will increase, for example, from 58 mm to 62 mm. Therefore, in this technical solution, when the sleeve and the joint core are in a crimping position, the nut and the sleeve are arranged at intervals, reserving space for the deformation amount of the sleeve after crimping, preventing the lengthened sleeve from abutting against the nut and forming interference, so that the nut cannot rotate and cannot be connected to the hydrogenation gun.

[0008] According to another specific embodiment of the present utility model, the first connection part includes a second groove, and the hydrogenation pipe joint includes a second sealing ring for being sleeved in the second groove. Along the first direction, the second groove and the first groove are arranged at intervals, and the second groove is located between the first groove and the second connection part.

[0009] By adopting the above technical solution, along the first direction, compared with the first sealing ring, the second sealing ring is arranged at a position closer to hydrogen. That is to say, if there is a hydrogen leakage situation, the second sealing ring can serve as the first line of defense to prevent hydrogen from leaking and permeating at the crimping part of the joint. After the second sealing ring ages due to long time or is corroded by hydrogen and loses its sealing effect, the first sealing ring can still serve as the second line of defense to prevent hydrogen from leaking and permeating at the crimping part of the joint.

[0010] According to another specific embodiment of the present utility model, when the sleeve and the joint core are in the swaging position, the distance between the nut and the sleeve is set to be 2 mm to 5 mm.

[0011] With the above technical solution, the distance between the nut and the sleeve depends on the deformation degree of the sleeve. If the distance is less than 2 mm, the reserved distance is not enough to meet the elongation of one end of the sleeve; if the distance is greater than 5 mm, the reserved distance is too large, much larger than the elongation of one end of the sleeve, which will cause waste of part dimensions.

[0012] According to another specific embodiment of the present utility model, the first connecting portion includes a serrated portion, and the serrated portion is provided between the first groove and the first part; when the sleeve and the joint core are in the swaging position, along the first direction, the end of the serrated portion is flush with the end of the third connecting portion.

[0013] With the above technical solution, along the first direction, one end of the serrated portion is flush with one end of the third connecting portion, which plays a role in positioning the installation of the sleeve. When one end of the third connecting portion completely covers the serrated portion, it indicates that the sleeve has been installed in place.

[0014] In addition, when the sleeve and the joint core are swaged by a swaging machine to form a connection, the serrated portion will be deformed at this time, making the gap between the first connecting portion and the third connecting portion form an irregular shape, which can prevent dust in the air from entering the inside of the hydrogenation pipe joint through the gap between the first connecting portion and the third connecting portion.

[0015] According to another specific embodiment of the present utility model, the first connecting portion includes a third groove, the third groove is spaced from the first groove, along the first direction, the third groove is provided between the first groove and the second connecting portion, and the third connecting portion includes a first convex portion for cooperating with the third groove.

[0016] With the above technical solution, through the cooperation of the first convex portion and the third groove, the third connecting portion of the sleeve is fixedly connected to the first connecting portion of the joint core.

[0017] According to another specific embodiment of the present utility model, along the first direction, the second connecting portion includes a plurality of spaced fourth grooves, and the depth of each fourth groove is 0.5 mm to 0.7 mm.

[0018] With the above technical solution, if the depth of the fourth groove is less than 0.5 mm, the deformation amount of one side of the third part of the external hose in the fourth groove cannot be satisfied; if the depth of the fourth groove is greater than 0.7 mm, the structural strength of the second connecting portion of the joint core will be affected.

[0019] According to another specific embodiment of the present utility model, along the first direction, the fourth connecting portion includes a plurality of fifth grooves arranged at intervals, and the depth of each fifth groove is 0.8 mm to 1.0 mm.

[0020] Adopting the above technical solution, if the depth of the fifth groove is less than 0.8 mm, the deformation amount of the other side of the third part of the external hose in the fifth groove cannot be satisfied; if the depth of the fifth groove is greater than 1.0 mm, the structural strength of the fourth connecting portion of the sleeve will be affected.

[0021] According to another specific embodiment of the present utility model, the fourth connecting portion includes a sixth groove. Along the first direction, the sixth groove is provided at one end of the fourth connecting portion away from the third connecting portion, and the depth of the sixth groove is greater than the depth of the fifth groove.

[0022] Adopting the above technical solution, the other side of the third part of the external hose is in the fifth groove, and the depth of the sixth groove is greater than the depth of the fifth groove, reserving space for a part of the rubber layer on one side of the external hose to enter the sixth groove subsequently.

[0023] The embodiment of the present utility model also discloses a hydrogenation assembly, and the hydrogenation assembly includes:

[0024] The hydrogenation pipe joint described in any one of the foregoing; a hose. Along the first direction, the hose includes a third part and a fourth part buckled between the second connecting portion and the fourth connecting portion. The third part includes a first steel wire layer in contact with the fourth connecting portion, and the fourth part includes a second steel wire layer and a rubber layer provided on the outer side of the second steel wire layer and in contact with the fourth connecting portion. Along the first direction, the third part is located between the first connecting portion and the fourth part.

[0025] Adopting the above technical solution, the third part is a hose with degumming treatment. The first steel wire layer of the third part is in contact with the fourth connecting portion, meeting the conductivity requirements for pipelines transporting hydrogen in ISO 19880-5.

[0026] The fourth part includes a rubber layer and a second steel wire layer, that is, the fourth part of the hose does not have degumming treatment and retains the outermost rubber layer. By retaining the outermost rubber layer, after buckling, the outermost rubber layer abuts against the end of the fourth connecting portion of the sleeve to achieve a sealing effect, thereby preventing dust and water vapor in the air from entering, ensuring that the first steel wire layer and the second steel wire layer do not come into contact with air, water vapor, etc. and are corroded and oxidized, and thus ensuring the service life of the hose.

[0027] According to another specific embodiment of the present utility model, the first sealing ring elastically presses against the first connecting portion and elastically presses against the third connecting portion, and the first sealing ring is completely located within the first groove; and / or, the second sealing ring elastically presses against the first connecting portion and elastically presses against the third connecting portion, and the second sealing ring is completely located within the second groove; and / or, the first convex portion is in interference fit with the third groove of the first connecting portion in the first direction and in clearance fit with the third groove in the second direction; and / or, along the second direction, the third portion is disposed between the fourth groove of the second connecting portion and the fifth groove of the fourth connecting portion, one side portion of the third portion enters the fourth groove, and the other side portion of the third portion enters the fifth groove; and / or, along the second direction, one side portion of the rubber layer enters the sixth groove; and / or, along the first direction, one end of the fourth portion is disposed between the second connecting portion and the fourth connecting portion, and the other end of the fourth portion is disposed outside the hydrogenation pipe joint.

[0028] With the above technical solution, when the second part of the sleeve and the joint core are crimped, the first sealing ring elastically presses against the first connecting portion and elastically presses against the third connecting portion. Therefore, the first sealing ring is subjected to the extrusion forces from the first connecting portion and the third connecting portion, causing the first sealing ring to deform and be completely located within the first groove, ensuring the sealing effect of the first sealing ring and preventing hydrogen from leaking and penetrating at the crimped part of the joint.

[0029] When the second part of the sleeve and the joint core are crimped, the second sealing ring elastically presses against the first connecting portion and elastically presses against the third connecting portion. Therefore, the second sealing ring is subjected to the extrusion forces from the first connecting portion and the third connecting portion, causing the second sealing ring to deform and be completely located within the second groove, ensuring the sealing effect of the second sealing ring and preventing hydrogen from leaking and penetrating at the crimped part of the joint.

[0030] When the second part of the sleeve and the joint core are crimped, the first convex portion is in interference fit with the third groove in the first direction, ensuring a firm fixed connection between the third connecting portion of the sleeve and the first connecting portion of the joint core. The connection mode of the first convex portion and the third groove in the second direction is divided into two types. One is that the first convex portion just contacts the third groove in the second direction. Since the inner diameter of the hydrogenation channel is small and the distance between the third groove and the hydrogenation channel is close in the second direction, if the first convex portion is in interference fit with the third groove in the second direction, it will cause the third groove to deform, and the inner diameter of the hydrogenation channel will also change accordingly.

[0031] Since it meets the condition that the first convex part just contacts the third groove in the second direction, the production process for the first convex part and the third groove is relatively difficult and the requirement for dimensional precision is too high. Therefore, the second connection method between the first convex part and the third groove in the second direction is as follows: the first convex part has a clearance fit with the third groove in the second direction, that is, after the third connection part of the sleeve is fixedly connected to the first connection part of the joint core, there is a small clearance between the first convex part and the third groove in the second direction. It is only necessary to ensure the fixed connection between the third connection part of the sleeve and the first connection part of the joint core by means of an interference fit between the first convex part and the third groove in the first direction. In this way, the production process difficulty of the first convex part and the third groove can be correspondingly reduced, and the requirement for dimensional precision can be lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Showing a schematic diagram of the connection between the hydrogenation pipe joint and the rubber pipe according to an embodiment of the present invention Figure 1 .

[0033] Figure 2 Showing a schematic diagram of the connection between the hydrogenation pipe joint and the hose according to an embodiment of the present invention Figure 2 , and the state at this time is before crimping, and the hydrogenation pipe joint includes a first sealing ring.

[0034] Figure 3 Showing a schematic diagram of the connection between the hydrogenation pipe joint and the hose according to an embodiment of the present invention Figure 3 , and the state at this time is after crimping, and the hydrogenation pipe joint includes a first sealing ring.

[0035] Figure 4 Showing a schematic diagram of the joint core according to an embodiment of the present invention Figure 1 .

[0036] Figure 5 Showing a schematic diagram of the sleeve according to an embodiment of the present invention Figure 1 .

[0037] Figure 6 Showing a schematic diagram of the connection between the hydrogenation pipe joint and the hose according to an embodiment of the present invention Figure 4 , and the state at this time is before crimping, and the hydrogenation pipe joint includes a first sealing ring and a second sealing ring.

[0038] Figure 7 Showing a schematic diagram of the connection between the hydrogenation pipe joint and the hose according to an embodiment of the present invention Figure 5 , and the state at this time is after crimping, and the hydrogenation pipe joint includes a first sealing ring and a second sealing ring.

[0039] Figure 8 Showing a schematic diagram of the joint core according to an embodiment of the present invention Figure 2 .

[0040] Figure 9Schematic diagram showing the sleeve of the embodiment of the present utility model Figure 2 。

[0041] Explanation of reference numerals

[0042] Hydrogenation pipe joint 10;

[0043] Joint core 11;

[0044] First part 111; First groove 1111; Second part 112; Second groove 1121;

[0045] Sleeve 12; Third part 121; Fourth part 122; Third groove 1221;

[0046] Nut 13; Sealing ring 14;

[0047] Rubber hose 20; Rubber layer 21; Steel wire layer 22;

[0048] Hydrogenation pipe joint 30;

[0049] Joint core 31;

[0050] First part 311;

[0051] Second part 312;

[0052] First connection part 3121; First groove 31211; Second groove 31212; Serrated part 31213; Third groove 31214; Second side wall 312141; First bottom wall 312142;

[0053] Second connection part 3122; Fourth groove 31221;

[0054] Hydrogenation channel 313;

[0055] Sleeve 32; Third connection part 321; First inner wall 3211; First convex part 3212; First side wall 32121; First top wall 32122; Fourth connection part 322; Fifth groove 3221; Sixth groove 3222;

[0056] Nut 33;

[0057] First sealing ring 34;

[0058] Second sealing ring 35;

[0059] Annular cavity 36; Cavity wall 361; Opening 362;

[0060] Hose 40; Third part 41; First steel wire layer 411; Fourth part 42; Rubber layer 421; Second steel wire layer 422. Detailed implementation manners

[0061] The following specific embodiments illustrate the implementation manners of the present utility model, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without these details. In addition, in order to avoid confusing or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0062] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0063] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0064] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0065] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0066] To make the purpose, technical solutions and advantages of the present utility model clearer, the implementation manners of the present utility model will be further described in detail below with reference to the drawings.

[0067] In view of the problems that occur in hydrogen transmission, in a possible implementation manner, those skilled in the art propose a method such as Figure 1The hydrogenation pipe joint 10 shown includes a joint core 11, a sleeve 12, a nut 13, and a sealing ring 14. Along the first direction X, the joint core 11 includes a first part 111 and a second part 112, and the sleeve 12 includes a third part 121 and a fourth part 122, and the third part 121 is curved. Along the second direction Y, the first part 111 includes a first groove 1111, and the sealing ring 14 is located within the first groove 1111. However, since the third part 121 is curved, it may exert a certain squeezing force on the sealing ring 14, or it may not be able to exert a squeezing force on the sealing ring 14. Since the sealing ring 14 is provided inside the hydrogenation pipe joint 10, it is impossible to know the specific squeezed state of the sealing ring 14, and thus it is impossible to know whether the sealing ring 14 has reached the compression deformation amount required for the desired sealing effect, and it cannot play a better role in preventing hydrogen leakage.

[0068] In addition, as can be seen from Figure 1 along the first direction X, the gap between the nut 13 and one end of the sleeve 12 is very small. When the sleeve 12 and the joint core 11 are connected by a swaging machine, the sleeve 12 will deform, and at this time, the nut 13 and one end of the sleeve 12 will abut against each other. At this time, the nut 13 cannot rotate and thus cannot be connected to the hydrogenation gun.

[0069] Those skilled in the art also propose a hydrogenation assembly as shown in Figure 1 which includes the aforementioned hydrogenation pipe joint 10 and a rubber hose 20. The rubber hose 20 includes a rubber layer 21 and a steel wire layer 22. Along the first direction X, the second part 112 of the joint core 11 includes a plurality of second grooves 1121, and the fourth part 122 of the sleeve 12 includes a plurality of third grooves 1221. The steel wire layer 22 is provided between the second grooves 1121 and the third grooves 1221. Along the second direction Y, one side of the steel wire layer 22 abuts against the second grooves 1121, and the other side of the steel wire layer 22 abuts against the third grooves 1221. Along the first direction X, one end of the rubber layer 21 is connected to the other end of the sleeve 12.

[0070] Since the rubber layer 21 is not connected to the inner wall of the sleeve 12, dust or water vapor in the air easily enters the pipeline interior through the gap between the rubber layer 21 and the other end of the sleeve 12, and the sealing effect is not achieved.

[0071] Referring to Figure 2 and Figure 3 , the present application provides a hydrogenation assembly, including a hydrogenation pipe joint 30 and a hose 40. The hydrogenation pipe joint 30 includes a joint core 31 and a sleeve 32, and the joint core 31 and the sleeve 32 are connected.

[0072] Referring to Figures 2 to 5, along the first direction X, the joint core 31 includes a first part 311, a second part 312 and a hydrogenation channel 313. The first part 311 and the second part 312 are both hollow structures. Along the first direction X, the hydrogenation channel 313 penetrates through the first part 311 and the second part 312. The second part 312 includes a first connecting portion 3121 and a second connecting portion 3122. The sleeve 32 includes a third connecting portion 321 corresponding to the first connecting portion 3121 and a fourth connecting portion 322 corresponding to the second connecting portion 3122.

[0073] , along the first direction X, the hose 40 includes a third part 41 and a fourth part 42 clamped between the second connecting portion 3122 and the fourth connecting portion 322. The third part 41 includes a first steel wire layer 411 in contact with the fourth connecting portion 322. The first steel wire layer 411 includes four layers of steel wire layers, and there is no rubber layer outside the first steel wire layer 411.

[0074] The fourth part 42 includes a second steel wire layer 422 and a rubber layer 421 in contact with the fourth connecting portion 322. The rubber layer 421 is provided outside the second steel wire layer 422. Along the first direction X, the third part 41 is located between the first connecting portion 3121 and the fourth part 42. The second steel wire layer 422 includes four layers of steel wire layers, and the second steel wire layer 422 and the first steel wire layer 411 are integrally arranged. That is, the third part 41 is a hose 40 with the rubber layer peeled off, and the fourth part 42 is a hose 40 without the rubber layer peeled off.

[0075] , along the second direction Y, the joint core 31 and the sleeve 32 define an annular cavity 36. The annular cavity 36 includes a cavity wall 361. The third part 41 is arranged in the annular cavity 36 and abuts against the cavity wall 361. Along the first direction X, one end of the fourth part 42 is arranged between the second connecting portion 3122 and the fourth connecting portion 322, and the other end of the fourth part 42 is arranged outside the hydrogenation pipe joint 30. That is to say, along the first direction X, one end of the fourth part 42 is arranged in the annular cavity 36 and abuts against the cavity wall 361, and the other end of the fourth part 42 is arranged outside the annular cavity 36. Along the first direction X, the annular cavity 36 includes an opening 362 for the third part 41 and one end of the fourth part 42 to be inserted into the annular cavity 36.

[0076] With the above technical solution, along the second direction Y, the first steel wire layer 411 of the third part 41 is arranged in the annular cavity 36 and abuts against the cavity wall 361, ensuring abutment with the sleeve 32, that is, the first steel wire layer 411 is in direct contact with the fourth connecting portion 322 of the sleeve 32, meeting the conductivity requirements for the hydrogen transmission pipeline in ISO 19880-5.

[0077] Along the first direction X, one end of the fourth part 42 (the rubber layer 421 and the second steel wire layer 422) is disposed between the joint core 31 and the sleeve 32, and the other end is disposed outside the sleeve 32. That is, at one end of the hydrogenation pipe joint 30, the hose 40 here is not degummed, and the outermost rubber layer 421 is retained. By retaining the outermost rubber layer 421, after swaging, the outermost rubber layer 421 abuts against the end of the sleeve 32 to achieve a sealing effect, thereby preventing dust and water vapor in the air from entering, ensuring that the first steel wire layer 411 and the second steel wire layer 422 do not come into contact with air, water vapor, etc. and are corroded and oxidized, and thus ensuring the service life of the hose 40.

[0078] It should be noted that the number of steel wire layers included in the first steel wire layer 411 is not specifically limited in the embodiments of the present application. For example, in other possible embodiments, the number of steel wire layers included in the first steel wire layer 411 can be six layers, eight layers, etc. The number of steel wire layers included in the second steel wire layer 422 is not specifically limited in the embodiments of the present application. For example, in other possible embodiments, the number of steel wire layers included in the second steel wire layer 422 can be six layers, eight layers, etc.

[0079] Next, the hydrogenation pipe joint 30 will be introduced in detail.

[0080] Reference Figures 2 to 3 , the hydrogenation pipe joint 30 further includes a nut 33. The nut 33 is connected to the first part 311, and the nut 33 is used to connect to an external hydrogenation gun.

[0081] Reference Figures 2 to 5 , the sleeve 32 is a hollow structure. When the sleeve 32 and the joint core 31 are in the swaging position, the sleeve 32 is sleeved outside the second part 312, and the outer surface of the sleeve 32 includes a surface for swaging. When the sleeve 32 and the joint core 31 are in the swaging position, the third connecting portion 321 is sleeved on the first connecting portion 3121, and the fourth connecting portion 322 is sleeved on the second connecting portion 3122. Along the second direction Y, the inner diameter of the fourth connecting portion 322 is greater than the outer diameter of the second connecting portion 3122, and the second direction Y intersects the first direction X. The second connecting portion 3122 and the fourth connecting portion 322 define an annular cavity 36, and the third part 41 of the hose 40 is sleeved on the second connecting portion 3122.

[0082] Reference Figures 3 to 5, the first connecting portion 3121 includes a first groove 31211, and the hydrogenation pipe joint 30 includes a first sealing ring 34 for sleeving in the first groove 31211. The third connecting portion 321 includes a first inner wall 3211. After the sleeve 32 is crimped with the second portion 312 of the joint core 31, the first sealing ring 34 elastically presses against the first connecting portion 3121 and elastically presses against the third connecting portion 321, that is, the first sealing ring 34 abuts against the first groove 31211 and the first inner wall 3211, so that the first sealing ring 34 is completely located within the first groove 31211.

[0083] With the above technical solution, after the sleeve 32 is crimped with the second portion 312 of the joint core 31, the first sealing ring 34 abuts against the first groove 31211 and the first inner wall 3211. Therefore, the first sealing ring 34 is subjected to the extrusion force from the first groove 31211 and the first inner wall 3211, causing the first sealing ring 34 to deform and be completely located within the first groove 31211, ensuring the sealing effect of the first sealing ring 34 and preventing hydrogen from leaking and permeating at the crimped joint of the joint.

[0084] Since the connection between the sleeve 32 and the joint core 31 is formed by crimping with a crimping machine, after crimping, the sleeve 32 will extend left and right, and the length of the sleeve 32 will increase, for example, from 58 mm to 62 mm. Therefore, in this technical solution, the nut 33 is spaced from the sleeve 32 to reserve space for the deformation amount of the sleeve 32 after crimping, preventing the lengthened sleeve 32 from abutting against the nut 33 and forming interference, so that the nut 33 cannot rotate and cannot be connected to the hydrogenation gun.

[0085] In some possible implementation manners, referring to Figures 6 to 9 , the first connecting portion 3121 includes a second groove 31212, and the hydrogenation pipe joint 30 includes a second sealing ring 35 for sleeving in the second groove 31212. Along the first direction X, the second groove 31212 is spaced from the first groove 31211, and the second groove 31212 is located between the first groove 31211 and the second connecting portion 3122. After the sleeve 32 is crimped with the second portion 312 of the joint core 31, the second sealing ring 35 elastically presses against the first connecting portion 3121 and elastically presses against the third connecting portion 321, that is, the second sealing ring 35 abuts against the second groove 31212 and the first inner wall 3211, so that the second sealing ring 35 is completely located within the second groove 31212.

[0086] With the above technical solution, along the first direction X, compared with the first sealing ring 34, the second sealing ring 35 is arranged closer to the hydrogen. That is to say, if there is a hydrogen leakage, the second sealing ring 35 can act as the first line of defense to prevent hydrogen from leaking and penetrating at the joint crimping part. After the second sealing ring 35 ages due to long time or is corroded by hydrogen and loses its sealing effect, the first sealing ring 34 can still act as the second line of defense to prevent hydrogen from leaking and penetrating at the joint crimping part.

[0087] After the sleeve 32 is crimped with the second part 312 of the joint core 31, the second sealing ring 35 abuts against the second groove 31212 and the first inner wall 3211. Therefore, the second sealing ring 35 is subjected to the extrusion force from the second groove 31212 and the first inner wall 3211, causing the second sealing ring 35 to deform and be completely located within the second groove 31212, ensuring the sealing effect of the second sealing ring 35 and preventing hydrogen from leaking and penetrating at the joint crimping part.

[0088] In some possible implementation manners, referring to Figure 3 , when the sleeve 32 and the joint core 31 are in the crimping position, the distance d between the nut 33 and the sleeve 32 is set to be 2 mm to 5 mm.

[0089] With the above technical solution, the distance d between the nut 33 and the sleeve 32 depends on the deformation degree of the sleeve 32. If the distance d is less than 2 mm, the reserved distance is not enough to meet the elongation of one end of the sleeve 32; if the distance d is greater than 5 mm, the reserved distance is too large, much larger than the elongation of one end of the sleeve 32, which will cause waste of part dimensions.

[0090] In some possible implementation manners, referring to Figures 3 to 5 , the first connecting portion 3121 includes a serrated portion 31213. Along the first direction X, the serrated portion 31213 is arranged between the first groove 31211 and the first portion 311. When the sleeve 32 and the joint core 31 are in the crimping position, along the first direction X, the end of the serrated portion 31213 is flush with the end of the third connecting portion 321.

[0091] With the above technical solution, along the first direction X, one end of the serrated portion 31213 is flush with one end of the third connecting portion 321, which plays a role in positioning the installation of the sleeve 32. When one end of the third connecting portion 321 completely covers the serrated portion 31213, it indicates that the sleeve 32 has been installed in place.

[0092] In addition, when the sleeve 32 and the joint core 31 are clamped to form a connection by a pipe swaging machine, the serrated portion 31213 will be deformed at this time, causing the gap between the first connecting portion 3121 and the third connecting portion 321 to form an irregular shape, which can prevent dust in the air from entering the inside of the hydrogenation pipe joint through the gap between the first connecting portion 3121 and the third connecting portion 321.

[0093] In some possible implementation manners, referring to Figures 3 to 5 , the first connecting portion 3121 includes a third groove 31214, and the third groove 31214 is arranged at an interval from the first groove 31211. Along the first direction X, the third groove 31214 is arranged between the first groove 31211 and the second connecting portion 3122. The third connecting portion 321 includes a first convex portion 3212 for cooperating with the third groove 31214. After the sleeve 32 and the second portion 312 of the joint core 31 are clamped, the first convex portion 3212 is in interference fit with the third groove 31214 in the first direction X, and is in clearance fit with the third groove 31214 in the second direction Y.

[0094] Along the first direction X, the first convex portion 3212 includes a first side wall 32121, and the third groove 31214 includes a second side wall 312141. Along the second direction Y, the first convex portion 3212 includes a first top wall 32122, and the third groove 31214 includes a first bottom wall 312142. After the sleeve 32 and the second portion 312 of the joint core 31 are clamped, the first side wall 32121 abuts against the second side wall 312141, and there is a small gap between the first top wall 32122 and the first bottom wall 312142.

[0095] Adopting the above technical solution, after the sleeve 32 and the second portion 312 of the joint core 31 are clamped, the first convex portion 3212 is in interference fit with the third groove 31214 in the first direction X, that is, the first side wall 32121 abuts against the second side wall 312141, ensuring that the third connecting portion 321 of the sleeve 32 is firmly and fixedly connected to the first connecting portion 3121 of the joint core 31.

[0096] There are two types of connection methods between the first convex portion 3212 and the third groove 31214 in the second direction Y. One is that the first convex portion 3212 just contacts the third groove 31214 in the second direction Y, that is, the first top wall 32122 just contacts the first bottom wall 312142. Since the inner diameter of the hydrogenation channel 313 is small, and in the second direction Y, the distance between the third groove 31214 and the hydrogenation channel 313 is relatively close. If the first top wall 32122 abuts against the first bottom wall 312142, it will cause the third groove 31214 to deform, and the inner diameter of the hydrogenation channel 313 will change accordingly.

[0097] Since the condition that the first top wall 32122 and the first bottom wall 312142 are just in contact is satisfied, the production process of the first convex portion 3212 and the third groove 31214 is relatively difficult, and the requirement for dimensional precision is too high. Therefore, the second connection mode of the first convex portion 3212 and the third groove 31214 in the second direction Y is that the first convex portion 3212 is in clearance fit with the third groove 31214 in the second direction Y, that is, there is a small gap between the first top wall 32122 and the first bottom wall 312142. That is to say, after the third connection portion 321 of the sleeve 32 is fixedly connected to the first connection portion 3121 of the joint core 31, there is a small gap between the first top wall 32122 and the first bottom wall 312142. Only the first side wall 32121 and the second side wall 312141 need to be in abutment to ensure the fixed connection between the third connection portion 321 of the sleeve 32 and the first connection portion 3121 of the joint core 31. In this way, the production process difficulty of the first convex portion 3212 and the third groove 31214 can be correspondingly reduced, and the requirement for dimensional precision can be lowered.

[0098] In some possible embodiments, referring to Figure 3 and Figure 4 , along the first direction X, the second connection portion 3122 includes ten fourth grooves 31221 arranged at intervals, and the depth of each fourth groove 31221 is 0.5 - 0.7 mm. When the sleeve 32 and the second portion 312 of the joint core 31 are crimped, along the second direction Y, one side portion of the third portion 41 enters into the fourth groove 31221.

[0099] Adopting the above technical solution, if the depth of the fourth groove 31221 is less than 0.5 mm, the deformation amount of one side of the third portion 41 in the fourth groove 31221 cannot be satisfied; if the depth of the fourth groove 31221 is greater than 0.7 mm, the structural strength of the second connection portion 3122 of the joint core 31 will be affected.

[0100] It should be noted that the number of the fourth grooves 31221 is not specifically limited in the embodiments of the present application. For example, in other possible embodiments, the number of the fourth grooves 31221 may be nine, eleven, etc.

[0101] In some possible embodiments, referring to Figures 3 to 5 , along the first direction X, the fourth connection portion 322 includes ten fifth grooves 3221 arranged at intervals, and the depth of each fifth groove 3221 is 0.8 - 1.0 mm. When the sleeve 32 and the second portion 312 of the joint core 31 are crimped, along the second direction Y, the other side (i.e., the first steel wire layer 411) of the third portion 41 partially enters into the fifth groove 3221. Combining the foregoing, that is, the third portion 41 is disposed between the fourth groove 31221 of the second connection portion 3122 and the fifth groove 3221 of the fourth connection portion 322.

[0102] With the above technical solution, if the depth of the fifth groove 3221 is less than 0.8 mm, the deformation amount of the first steel wire layer 411 in the fifth groove 3221 cannot be satisfied; if the depth of the fifth groove 3221 is greater than 1.0 mm, the structural strength of the fourth connecting portion 322 of the sleeve 32 will be affected.

[0103] At the same time, after the sleeve 32 and the second part 312 of the joint core 31 are crimped, along the second direction Y, the other side portion of the first steel wire layer 411 enters the fifth groove 3221, ensuring that the first steel wire layer 411 is in direct contact with the fourth connecting portion 322 of the sleeve 32, meeting the conductivity requirements for hydrogen transmission pipelines in ISO 19880-5.

[0104] It should be noted that the number of the fifth grooves 3221 is not specifically limited in the embodiments of the present application. For example, in other possible embodiments, the number of the fifth grooves 3221 can be nine, eleven, etc.

[0105] In some possible embodiments, referring to Figures 3 to 5 , the fourth connecting portion 322 includes a sixth groove 3222. Along the first direction X, the sixth groove 3222 is provided at one end of the fourth connecting portion 322 away from the third connecting portion 321, and the depth of the sixth groove 3222 is greater than the depth of the fifth groove 3221. After the sleeve 32 and the second part 312 of the joint core 31 are crimped, one side portion of the rubber layer 421 enters the sixth groove 3222.

[0106] With the above technical solution, one side of the first steel wire layer 411 is in the fifth groove 3221, and the depth of the sixth groove 3222 is greater than the depth of the fifth groove 3221, reserving space for one side portion of the rubber layer 421 of the fourth part 42 to enter the sixth groove 3222.

[0107] After the sleeve 32 and the second part 312 of the joint core 31 are crimped, one side portion of the rubber layer 421 enters the sixth groove 3222, that is, the hose 40 at the sixth groove 3222 is not degummed, and the outermost rubber layer 421 is retained. By retaining the outermost rubber layer 421, after crimping, the outermost rubber layer 421 abuts against the end of the fourth connecting portion 322 of the sleeve 32 to achieve a sealing effect, thereby preventing dust and moisture in the air from entering the pipeline interior.

[0108] Although the present utility model has been illustrated and described with reference to some preferred embodiments thereof, those of ordinary skill in the art should understand that the above content is a further detailed description of the present utility model in combination with specific embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. Those skilled in the art can make various changes in form and detail, including making several simple deductions or substitutions, without departing from the spirit and scope of the present utility model.

Claims

1. A hydrogenation pipe joint, characterized in that: The hydrogenation pipe joint comprises: A joint core, along a first direction, the joint core comprises a first portion, a second portion and a hydrogenation channel, the second portion comprises a first connecting portion and a second connecting portion, the first connecting portion comprises a first groove, and along the first direction, the hydrogenation channel runs through the first portion and the second portion; A nut connected to the first part, the nut being used to connect to an external hydrogenation gun; A sleeve, the sleeve is used to be sleeved on the outer side of the second part, the sleeve is a hollow structure, the outer side of the sleeve includes an outer surface for buckling, the sleeve also includes a third connection part corresponding to the first connection part and a fourth connection part corresponding to the second connection part, along the second direction, the inner diameter of the fourth connection part is greater than the outer diameter of the second connection part, when the sleeve and the joint core are in the buckling position, along the first direction, the nut and the sleeve are spaced apart, and the second direction intersects with the first direction; A first sealing ring, wherein the first sealing ring is used to be sleeved in the first groove.

2. The hydrogenation pipe joint according to claim 1, characterized in that: The first connection portion includes a second groove, and the hydrogenation pipe joint includes a second sealing ring for sleeved in the second groove. Along the first direction, the second groove is spaced apart from the first groove, and the second groove is located between the first groove and the second connection portion.

3. The hydrogenation pipe joint according to claim 1, characterized in that: When the sleeve and the joint core are in the buckling position, the nut and the sleeve are spaced apart by a distance of 2 mm to 5 mm.

4. The hydrogenation pipe joint according to claim 1, characterized in that: The first connection portion includes a serration portion, and the serration portion is arranged between the first groove and the first part; when the sleeve and the joint core are in the buckling position, along the first direction, the end of the serration portion is flush with the end of the third connection portion.

5. The hydrogenation pipe joint according to claim 1, characterized in that: The first connection portion includes a third groove, the third groove is spaced apart from the first groove, and along the first direction, the third groove is arranged between the first groove and the second connection portion, and the third connection portion includes a first protrusion for cooperating with the third groove.

6. The hydrogenation pipe joint according to claim 1, characterized in that: Along the first direction, the second connection portion includes a plurality of fourth grooves arranged at intervals, and a depth of each of the fourth grooves is 0.5 mm to 0.7 mm.

7. The hydrogenation pipe joint according to claim 1, characterized in that: Along the first direction, the fourth connection portion includes a plurality of fifth grooves arranged at intervals, and a depth of each of the fifth grooves is 0.8 mm to 1.0 mm.

8. The hydrogenation pipe joint according to claim 7, characterized in that: The fourth connection portion includes a sixth groove. Along the first direction, the sixth groove is arranged at an end of the fourth connection portion away from the third connection portion. The depth of the sixth groove is greater than the depth of the fifth groove.

9. A hydrogenation assembly, characterized in that: The hydrogenation assembly comprises: The hydrogenation pipe joint according to any one of claims 1 to 8; A hose, along the first direction, the hose includes a third part and a fourth part buckled between the second connecting part and the fourth connecting part, the third part includes a first steel wire layer in contact with the fourth connecting part, the fourth part includes a second steel wire layer and a rubber layer arranged on the outside of the second steel wire layer and in contact with the fourth connecting part, and along the first direction, the third part is located between the first connecting part and the fourth part.

10. The hydrogenation assembly according to claim 9, characterized in that The first sealing ring is elastically pressed against the first connecting portion and elastically pressed against the third connecting portion, and the first sealing ring is completely located in the first groove; and / or, The second sealing ring is elastically pressed against the first connecting portion and elastically pressed against the third connecting portion, and the second sealing ring is completely located in the second groove; and / or, The first protrusion has an interference fit with the third groove of the first connecting portion in the first direction, and has a clearance fit with the third groove in the second direction; and / or, Along the second direction, the third portion is disposed between the fourth groove of the second connecting portion and the fifth groove of the fourth connecting portion, one side portion of the third portion enters the fourth groove, and the other side portion of the third portion enters the fifth groove; and / or, Along the second direction, a portion of one side of the rubber layer enters into the sixth groove; and / or, Along the first direction, one end of the fourth portion is disposed between the second connection portion and the fourth connection portion, and the other end of the fourth portion is disposed outside the hydrogenation pipe joint.

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