Joint structure

Abstract

The utility model provides a joint structure, which relates to the technical field of pipeline connection, and comprises a joint body, the outer wall of the joint body is provided with a connecting structure, and the connecting structure is used for connecting a hose; the connecting structure comprises a plurality of convex parts and concave parts which are alternately arranged, each convex part is provided with a guide-in surface and a limiting surface, the guide-in surface is arranged in the hose mounting direction, the limiting surface is opposite to the guide-in surface, and the taper of the guide-in surface of each convex part is smaller than that of the limiting surface; in the installation direction of the hose, the multiple protruding parts comprise the first type of protruding parts and the second type of protruding parts, and the taper of the limiting face corresponding to the first type of protruding parts is smaller than that of the limiting face corresponding to the second type of protruding parts. According to the joint structure, the connection strength and the connection sealing performance between the hose and the joint structure can be considered, the stable and reliable sealing performance between the hose and the joint structure is achieved, and meanwhile the connection strength between the hose and the joint structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a joint structure. Background Art

[0002] In liquid cooling systems such as energy storage and data centers, fluids circulate through piping systems, and pipes in the piping system are connected to each other and to devices through joints. In order to ensure the reliability of the system during operation, reliability tests are usually required for the piping system within a pressure range of 3bar-10bar. These tests are designed to verify the reliability of the joints and pipe connections, and prevent failure modes such as fluid leakage or insufficient connection strength caused by factors such as fluid pressure and external environmental stress.

[0003] In the process of implementing the present invention, the inventors found that the existing joints have at least the following technical problems:

[0004] The connection strength between the joint and the pipeline is limited, and as the system pressure increases, the risk of leakage and slippage is very likely to occur. However, in order to improve the connection strength between the joint and the pipeline, a tapered step structure is usually formed on the sealing surface of the joint. Although this step structure can increase the connection strength between the joint and the pipeline, it will also cause the pipeline to be stressed at the tip of the step, which will cause the inner layer of the pipeline to relax and even damage the inner layer of the pipeline, thereby increasing the risk of leakage. Utility Model Content

[0005] The utility model aims to provide a joint structure with good connection strength and sealing performance.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A joint structure comprises a joint body, the outer wall of the joint body is provided with a connection structure, and the connection structure is used to connect a hose;

[0008] The connection structure comprises a plurality of alternately arranged convex parts and concave parts, each of the convex parts is provided with an introduction surface facing the installation direction of the hose and a limiting surface opposite to the introduction surface, and the taper of the introduction surface of each convex part is smaller than the taper of the limiting surface;

[0009] Along the installation direction of the hose, the plurality of protrusions include first-type protrusions and second-type protrusions, and the taper of the limiting surface corresponding to the first-type protrusions is smaller than the taper of the limiting surface corresponding to the second-type protrusions.

[0010] Furthermore, the taper of the limiting surface corresponding to the first type of convex portion is less than 90°, and the taper of the limiting surface corresponding to the second type of convex portion is 90°.

[0011] Furthermore, a longitudinal cross-sectional profile of each of the protrusions along the axial direction of the joint body is trapezoidal.

[0012] Furthermore, each of the convex portions is provided with a top surface connected between the limiting surface and the introduction surface; the top surface and the limiting surface are connected via a rounded corner, and / or the top surface and the introduction surface are connected via a rounded corner;

[0013] The radius of the fillet is in the range of 0.1 mm to 0.5 mm.

[0014] Furthermore, the longitudinal cross-sectional profile of the first type of protrusion along the axial direction of the joint body is trapezoidal, and the longitudinal cross-sectional profile of the second type of protrusion along the axial direction of the joint body is triangular.

[0015] Further, the first type of convex portion includes two convex portions, and the second type of convex portion includes one or more convex portions.

[0016] Furthermore, a first limiting portion is provided on the outer wall of the connector body, the first limiting portion and the connecting structure are arranged in sequence along the installation direction of the hose, and the maximum outer diameter of the first limiting portion is greater than the maximum outer diameter of the convex portion.

[0017] Furthermore, a second limiting portion is provided on the outer wall of the joint body, the connecting structure is located between the first limiting portion and the second limiting portion, and the maximum outer diameter of the second limiting portion is greater than the maximum outer diameter of the protrusion.

[0018] Further, the connection structure includes a starting end connected to the first limiting portion and a terminating end connected to the second limiting portion, and the recess is provided at both the starting end and the terminating end.

[0019] Further, the longitudinal cross-sectional profile of the first limiting portion along the axial direction of the joint body is in an arc shape, and / or the longitudinal cross-sectional profile of the second limiting portion along the axial direction of the joint body is in an arc shape.

[0020] Further, the outer diameter of the recess is not less than the inner diameter of the hose;

[0021] and / or, the number of the recesses is at least two, and the width of the recesses in the hose installation direction is 2 mm;

[0022] And / or, the distance between the bottom end of the concave portion and the top end of the convex portion ranges from 0.2 mm to 0.5 mm.

[0023] Compared with the prior art, the joint structure provided by the embodiment of the utility model has at least the following technical effects:

[0024] The connection structure includes a plurality of alternately arranged convex portions and concave portions, each convex portion is provided with an introduction surface facing the installation direction of the hose and a limiting surface opposite to the introduction surface, and the taper of the introduction surface of each convex portion is smaller than the taper of the limiting surface, so that the force when the hose and the joint structure are assembled can be reduced, and at the same time, sufficient resistance in the direction of hose removal can be ensured to improve the connection strength between the hose and the joint structure; in addition, along the installation direction of the hose, the plurality of convex portions include a first type of convex portion and a second type of convex portion, and the taper of the limiting surface corresponding to the first type of convex portion is smaller than the taper of the limiting surface corresponding to the second type of convex portion, so that the connection between the hose and the joint structure can be taken into account. The connection strength and connection sealing performance make the hose and the joint structure have stable and reliable sealing performance, and at the same time further improve the connection strength between the hose and the joint structure. Specifically, the relatively small taper of the limiting surface corresponding to the first type of convex part can avoid stress concentration in the inner layer of the hose, so as to reduce the relaxation phenomenon of the inner layer of the hose or the risk of damage to the inner layer of the hose, thereby making the hose and the joint structure have stable and reliable sealing performance and reducing the risk of leakage. The relatively large taper of the limiting surface corresponding to the second type of convex part can ensure that the hose has sufficient resistance in the removal direction, so as to improve the connection strength between the hose and the joint structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of a smooth single convex hull type joint in the prior art;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of a pagoda-shaped joint in the prior art;

[0027] Figure 3 is an overall cross-sectional schematic diagram of a joint structure in an embodiment;

[0028] Figure 4 is a cross-sectional schematic diagram of a connection structure in an embodiment;

[0029] Figure 5 A partial cross-sectional schematic diagram of a joint structure in an embodiment;

[0030] Figure 6 A partial cross-sectional schematic diagram of a joint structure in another embodiment;

[0031] Figure 7 It is a schematic overall cross-sectional view of a joint structure in another embodiment.

[0032] Description of Figure Numbers:

[0033] 10. Smooth single convex joint; 11. Sealed smooth surface; 12. Boss;

[0034] 20. Pagoda-shaped joint; 21. Joint sealing surface; 22. Step structure;

[0035] 30. Joint structure; 31. Joint body; 32. Connection structure; 321. Protrusion; 3211. Introduction surface; 3212. Limiting surface; 3213. First type of protrusion; 3214. Second type of protrusion; 3215. Top surface; 3216. Rounded corner; 322. Concave portion; 323. Starting end; 324. Ending end; 33. First limiting portion; 34. Second limiting portion. DETAILED DESCRIPTION

[0036] The technical solution of the utility model is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the utility model. The terms used herein in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0037] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0038] The inventor of the present application found in the design research of the liquid cooling system that the existing liquid cooling system pipeline system usually adopts flexible non-metallic pipes and hard joints to connect through throat clamps. The most common joint form is a smooth single convex hull type joint 10. Please refer to the attached Figure 1The smooth single convex hull type connector 10 includes a sealing smooth surface 11 and a boss 12. After the hose is inserted into the sealing smooth surface 11, a clamp is used to compress the hose to achieve sealing at the compression point. However, the connection strength between this connector and the hose is limited. As the system pressure increases, the risk of leakage and slippage gradually increases. In the system reliability test experiment, when the test pressure is higher than 3 bar, the connector will leak frequently, and even fail to achieve connection with the hose due to insufficient connection strength. Therefore, the smooth single convex hull type connector 10 can only be used in relatively low pressure systems. In order to improve the connection strength between the connector and the hose, the interference between the hose and the connector will be increased, or the compression of the hose will be increased. However, increasing the interference may make it difficult to insert the hose into the connector during production and assembly, and increasing the compression may shorten the service life of the hose.

[0039] In addition, in order to improve the connection strength between the connector and the hose, please refer to the attached Figure 2 The joint adopts a pagoda-shaped joint 20, and specifically, a tapered step structure 22 is formed on the joint sealing surface 21. The step structure 22 can increase the connection strength between the joint and the hose. However, this joint will cause the hose to be subjected to stress concentration at the peak of the step tip, which can easily cause the inner layer of the hose to loosen or even damage the inner layer of the hose. In addition, after the peak of each step tip ends, it drops to the minimum diameter in a straight line. The hose is basically in a suspended state between the peak of the previous step tip and the beginning of the next step without contact with the joint. The sealing surface is mainly sealed by the peak of each step and the narrower surface nearby, which affects the sealing performance between the joint and the hose. In addition, the pagoda-shaped joint 20 has the problem of relatively high processing cost and difficulty in disassembling the hose.

[0040] In summary, in order to take into account both the connection strength and the sealing reliability between the connector and the hose, a new connector structure 30 is urgently needed. An embodiment of the connector structure 30 is described in detail below.

[0041] Please refer to the attached Figure 3 and attached Figure 4 An embodiment of the utility model provides a joint structure 30, including a joint body 31, and a connection structure 32 is provided on the outer wall of the joint body 31, and the connection structure 32 is used to connect a hose. The joint body 31 is provided with a fluid channel, and when the joint structure 30 and the hose are assembled, the hose and the joint structure 30 can be connected by plugging. After the plugging connection, a throat clamp is applied to the corresponding position of the connection structure 32, and the hose is compressed so that the inner layer of the hose is more tightly connected to the outer wall of the connection structure 32 through elastic deformation, thereby increasing the connection strength between the hose and the joint structure 30.

[0042] It is worth mentioning that the connection structure 32 includes a plurality of alternately arranged convex portions 321 and concave portions 322, wherein the convex portion 321 may have the following but is not limited to the following forms: one is a closed annular convex portion 321 arranged along the circumference of the connector body 31, another is a non-closed arcuate convex portion 321 arranged along the circumference of the connector body 31, and another is a plurality of convex portion 321 units arranged in sequence along the circumference of the connector body 31. Each convex portion 321 is provided with an introduction surface 3211 arranged facing the hose installation direction and a limiting surface 3212 opposite to the introduction surface 3211; it can be explained that the hose installation direction is shown in the attached Figure 4 The direction indicated by the arrow is the direction in which the hose approaches the joint structure 30; the introduction surface 3211 refers to the part that guides and assists the hose to be installed smoothly during the process of installing the hose on the joint structure 30. The introduction surface 3211 is usually designed to be smooth and tapered to facilitate the hose to be installed on the joint structure 30 more smoothly; the limiting surface 3212 refers to the part that limits the hose from being pulled off the joint structure 30 after the hose is installed on the joint structure 30. The limiting surface 3212 is usually designed to be tapered to ensure that the hose is installed more tightly on the joint structure 30 to avoid the risk of the hose slipping from the joint structure 30 due to factors such as fluid pressure or external environmental stress. The taper of the introduction surface 3211 of each protrusion 321 and the taper of the limiting surface 3212 are anisotropic. Specifically, the taper of the introduction surface 3211 of each protrusion 321 is smaller than the taper of the limiting surface 3212. By setting the taper of the introduction surface 3211 to be relatively small, the force during the assembly of the hose and the joint structure 30 can be reduced, and the risk of damage to the inner layer of the hose by the top of the protrusion 321 can be reduced; by setting the taper of the limiting surface 3212 to be relatively large, it can be ensured that there is sufficient resistance in the direction of hose removal, so as to improve the connection strength between the hose and the joint structure 30.

[0043] It is worth mentioning that, along the installation direction of the hose, the plurality of protrusions 321 include but are not limited to the first type of protrusions 3213 and the second type of protrusions 3214, and the taper of the limiting surface 3212 corresponding to the first type of protrusions 3213 is smaller than the taper of the limiting surface 3212 corresponding to the second type of protrusions 3214. By setting the taper of the limiting surface 3212 corresponding to the first type of protrusions 3213 to be relatively small, stress concentration in the inner layer of the hose can be avoided to reduce the relaxation of the inner layer of the hose or the risk of damage to the inner layer of the hose. In addition, the hose forms a sealing surface between the top of the front protrusion 321 of the first type of protrusion 3213 and the beginning of the rear protrusion 321, and the sealing area is large, so that a stable and reliable sealing performance can be formed between the hose and the first type of protrusion 3213. It should be further explained that the connection structure 32 includes a starting end 323 and a terminating end 324, the starting end 323 refers to the part that the hose contacts first when the joint structure 30 is installed, and the terminating end 324 refers to the part that the hose contacts last when the joint structure 30 is installed, the first type of protrusion 3213 is arranged close to the starting end 323, and the second type of protrusion 3214 is arranged close to the terminating end 324. The taper of the limiting surface 3212 corresponding to the second type of protrusion 3214 is greater than the taper of the limiting surface 3212 corresponding to the first type of protrusion 3213, which can ensure that the hose has sufficient resistance in the pulling-off direction to improve the connection strength between the hose and the joint structure 30, but compared with the pagoda-shaped joint 20, it will also reduce the pulling-out force when the hose is disassembled, which is convenient for disassembly during maintenance.

[0044] The setting of the taper of the limiting surface 3212 corresponding to the first type of protrusion 3213 arranged near the starting end 323 proposed in this embodiment is smaller than the taper of the limiting surface 3212 corresponding to the second type of protrusion 3214 arranged near the ending end 324. This can take into account both the connection strength and the connection sealing performance between the hose and the joint structure 30, so that the joint structure 30 is suitable for use scenarios with higher working pressure. The reasons are as follows: after the hose and the joint structure 30 are connected, the path of fluid leakage is from the starting end 323 to the ending end 324. The limiting surface 3212 corresponding to the first type of protrusion 3213 arranged near the starting end 323 can avoid stress concentration of the hose at the top of the protrusion 321 to reduce damage to the inner layer of the hose, and improve the sealing of the hose and the joint structure 30 near the starting end 323. The limiting surface 3212 corresponding to the second type of protrusion 3214 near the ending end 324 can increase the connection strength between the hose and the joint structure 30. Even if the second type of protrusion 3214 has the risk of causing stress concentration in the inner layer of the hose or damaging the inner layer of the hose, since the first type of protrusion 3213 near the starting end 323 has provided a stable and reliable sealing between the hose and the joint structure 30, there will be no risk of liquid leakage between the hose and the joint structure 30.

[0045] In summary, in this embodiment, the connection structure 32 includes a plurality of alternately arranged convex portions 321 and concave portions 322, each convex portion 321 is provided with an introduction surface 3211 arranged facing the hose installation direction and a limiting surface 3212 opposite to the introduction surface 3211, and the setting that the taper of the introduction surface 3211 of each convex portion 321 is smaller than the taper of the limiting surface 3212 can reduce the force when the hose and the joint structure 30 are assembled, and at the same time, it can ensure that there is sufficient resistance in the direction of the hose being pulled out, so as to improve the connection strength between the hose and the joint structure 30; in addition, along the hose installation direction, the plurality of convex portions 321 include a first type of convex portion 3213 and a second type of convex portion 3214, and the taper of the limiting surface 3212 corresponding to the first type of convex portion 3213 is smaller than the limiting surface 3212 corresponding to the second type of convex portion 3214. The setting of the taper of 12 can take into account the connection strength and connection sealing performance between the hose and the joint structure 30, so that the hose and the joint structure 30 have stable and reliable sealing performance, and at the same time further improve the connection strength between the hose and the joint structure 30. Specifically, the setting of the relatively small taper of the limiting surface 3212 corresponding to the first type of protrusion 3213 can avoid stress concentration in the inner layer of the hose, so as to reduce the relaxation phenomenon of the inner layer of the hose or the risk of damage to the inner layer of the hose, thereby ensuring stable and reliable sealing performance between the hose and the joint structure 30 and reducing the risk of leakage. The setting of the relatively large taper of the limiting surface 3212 corresponding to the second type of protrusion 3214 can ensure that the hose has sufficient resistance in the removal direction, so as to improve the connection strength between the hose and the joint structure 30.

[0046] In some optional embodiments, the taper of the limiting surface 3212 corresponding to the first type of protrusion 3213 is less than 90°, and the taper of the limiting surface 3212 corresponding to the second type of protrusion 3214 is 90°.

[0047] In some optional embodiments, the first type of protrusion 3213 includes two protrusions 321. In a specific example, the first type of protrusion 3213 includes a first protrusion 321 and a second protrusion 321 sequentially arranged along the hose assembly direction. The taper of the limiting surface 3212 corresponding to the first protrusion 321 and the taper of the limiting surface 3212 corresponding to the second protrusion 321 can be the same and both are less than 90°, or the taper of the limiting surface 3212 corresponding to the second protrusion 321 is greater than the taper of the limiting surface 3212 corresponding to the first protrusion 321, but both are less than 90°. The tapers of the limiting surfaces 3212 corresponding to the first protrusion 321 and the second protrusion 321 are both less than 90°, mainly to ensure the connection sealing between the hose and the joint structure 30.

[0048] It should be further explained that the second type of protrusion 3214 includes one or more protrusions 321. In a specific example, the second type of protrusion 3214 includes a third protrusion 321 located behind the second protrusion 321, and the taper of the limiting surface 3212 corresponding to the third protrusion 321 is 90°. The taper of the limiting surface 3212 corresponding to the third protrusion 321 is increased to 90°, mainly to improve the connection strength between the hose and the joint structure 30 on the basis of the first protrusion 321 and the second protrusion 321.

[0049] Please see attached Figure 5 In some optional embodiments, the longitudinal cross-sectional profile of each protrusion 321 along the axial direction of the connector body 31 is trapezoidal. The structure of the protrusion 321 is optimized by finite element simulation technology to reduce the stress concentration problem of the inner layer of the hose and increase the sealing performance. Specifically, each protrusion 321 is provided with a top surface 3215 connected between the limiting surface 3212 and the introduction surface 3211; the top surface 3215 and the limiting surface 3212 are connected by a fillet 3216, and / or the top surface 3215 and the introduction surface 3211 are connected by a fillet 3216. The setting of the fillet 3216 can reduce the stress concentration problem of the inner layer of the hose, and also increase the sealing surface area between the hose and the connector structure 30, so that the entire hose forms as many sealing paths as possible within the compression width range, avoiding the situation where part of the inner layer of the hose is suspended without contacting the connector structure 30.

[0050] In some optional embodiments, the radius of the fillet 3216 ranges from 0.1 mm to 0.5 mm. If the radius of the fillet 3216 is too small, stress concentration of the hose will occur. If the radius of the fillet 3216 is too large, the sealing stress at the connection between the top surface 3215 of the convex portion 321 and the limiting surface 3212 and / or the connection between the top surface 3215 and the introduction surface 3211 will not be high enough. Preferably, the radius of the fillet 3216 is 0.2 mm.

[0051] Please see attached Figure 6 In some optional embodiments, the longitudinal section profile of the first type protrusion 3213 along the axial direction of the connector body 31 is trapezoidal, and the longitudinal section profile of the second type protrusion 3214 along the axial direction of the connector body 31 is triangular. In this embodiment, the longitudinal section profile of the second type protrusion 3214 along the axial direction of the connector body 31 is triangular, which can further improve the connection strength between the hose and the connector structure 30 compared with the longitudinal section profile of the second type protrusion 3214 along the axial direction of the connector body 31 being trapezoidal.

[0052] Please refer to the attached Figure 5 and attached Figure 6In some optional embodiments, a first limiting portion 33 is further provided on the outer wall of the connector body 31, and the first limiting portion 33 and the connecting structure 32 are sequentially arranged along the installation direction of the hose, and the maximum outer diameter of the first limiting portion 33 is greater than the maximum outer diameter of the convex portion 321. It can be explained that the maximum outer diameter of the first limiting portion 33 is greater than the maximum outer diameter of the convex portion 321, which means that the protruding height of the first limiting portion 33 relative to the connector body 31 is greater than the protruding height of the convex portion 321 of the connecting structure 32 relative to the connector body 31. On the one hand, the first limiting portion 33 can limit the throat clamp to prevent the throat clamp from accidentally slipping along the axial direction of the connector body 31. On the other hand, the maximum outer diameter of the first limiting portion 33 is greater than the maximum outer diameter of the convex portion 321, which can form a high sealing stress area at the starting end 323 of the connecting structure 32 of the hose, so that the hose and the connector structure 30 form a more stable and reliable sealing connection.

[0053] Please see attached Figure 7 In some optional embodiments, a second limiting portion 34 is further provided on the outer wall of the joint body 31, the connection structure 32 is located between the first limiting portion 33 and the second limiting portion 34, and the maximum outer diameter of the second limiting portion 34 is greater than the maximum outer diameter of the protrusion 321. It can be explained that the maximum outer diameter of the second limiting portion 34 is greater than the maximum outer diameter of the protrusion 321, which means that the protruding height of the second limiting protrusion 321 relative to the joint body 31 is greater than the protruding height of the protrusion 321 of the connection structure 32 relative to the joint body 31. The position of the throat hoop is limited by the cooperation between the second limiting portion 34 and the first limiting portion 33, so as to ensure that the position of the throat hoop is exactly pressed on the position of the connection structure 32, avoid the installation misalignment of the throat hoop, and improve the assembly efficiency.

[0054] In some optional embodiments, the connecting structure 32 includes a starting end 323 connected to the first limiting portion 33 and a terminating end 324 connected to the second limiting portion 34. A recess 322 is provided at both the starting end 323 and the terminating end 324, so that the hose has a high sealing stress after passing through the first limiting portion 33, and can be compressed and filled in the adjacent recess 322 to form a better seal. Furthermore, the smaller taper of the inlet surface 3211 of the convex portion 321 connected to the recess 322 can avoid excessive stress concentration of the hose at the convex portion 321, thereby achieving a high sealing force of the hose while avoiding the risk of stress concentration of the hose at the convex portion 321.

[0055] In some optional embodiments, the first limit portion 33 has an arc-shaped longitudinal cross-sectional profile along the axial direction of the connector body 31, and / or the second limit portion 34 has an arc-shaped longitudinal cross-sectional profile along the axial direction of the connector body 31. The arc-shaped setting can increase the sealing surface area between the hose and the connector structure 30, and improve the sealing performance between the two.

[0056] In some optional embodiments, the outer diameter of the recess 322 is not less than the inner diameter of the hose, so that the hose and the recess 322 have an interference fit, ensuring a sealed and reliable connection between the hose and the joint structure 30. In addition, the outer diameter of the recess 322 can be the same as the outer diameter of the joint body 31.

[0057] In some optional embodiments, the longitudinal cross-sectional profile of the recess 322 along the axial direction of the connector body 31 is inverted trapezoidal. The widths of the protrusion 321 and the recess 322 should be designed appropriately to ensure that within the entire compression width range of the throat clamp, the number of recesses 322 is at least two, and the preferred number of recesses 322 is 3-5. This design can greatly improve the connection strength and sealing stress between the hose and the connector structure 30. Furthermore, the distance between the bottom end of the recess 322 and the top end of the protrusion 321 is in the range of 0.2mm-0.5mm. 。

[0058] In a specific example, the depth of the recess 322 is 0.3 mm, that is, the distance between the bottom end of the recess 322 and the top end of the protrusion 321 is 0.3 mm, and the width of the recess 322 in the hose installation direction is 2 mm. Such depth and width form an optimal size combination, which allows the hose to fully fill the entire recess 322 after compression, thereby providing better connection strength and sealing performance.

[0059] The joint structure 30 provided in the above embodiment has at least the following characteristics:

[0060] (1) The connection structure 32 includes a plurality of alternately arranged convex portions 321 and concave portions 322, thereby improving the connection strength and sealing reliability between the hose and the joint structure 30;

[0061] (2) By differentiating the taper of the introduction surface 3211 and the taper of the limit surface 3212 of the convex portion 321, and designing different arrangement sequences along the installation direction of the hose, it is ensured that there is a sufficiently high sealing force between the hose and the joint structure 30, and at the same time, the connection strength between the hose and the joint structure 30 is improved;

[0062] (3) The installation position of the throat clamp is positioned by the cooperation between the second limiting portion 34 and the first limiting portion 33, so as to avoid misalignment of the installation of the throat clamp and improve the assembly efficiency between the hose and the joint structure 30;

[0063] (4) Through the combined design of the depth and width of the recess 322, the filling rate of the hose in the recess 322 under compression deformation is improved, the area of ​​the sealing surface is increased, and the stress concentration phenomenon in the inner layer of the hose is reduced.

[0064] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A joint structure, characterized in that: It comprises a joint body, the outer wall of which is provided with a connection structure, and the connection structure is used to connect a hose; The connection structure comprises a plurality of alternately arranged convex parts and concave parts, each of the convex parts is provided with an introduction surface facing the installation direction of the hose and a limiting surface opposite to the introduction surface, and the taper of the introduction surface of each convex part is smaller than the taper of the limiting surface; Along the installation direction of the hose, the plurality of protrusions include first-type protrusions and second-type protrusions, and the taper of the limiting surface corresponding to the first-type protrusions is smaller than the taper of the limiting surface corresponding to the second-type protrusions.

2. The joint structure according to claim 1, characterized in that: The taper of the limiting surface corresponding to the first type of convex portion is less than 90°, and the taper of the limiting surface corresponding to the second type of convex portion is 90°.

3. The joint structure according to claim 2, characterized in that: The longitudinal cross-sectional profile of each protrusion along the axial direction of the joint body is trapezoidal.

4. The joint structure according to claim 3, characterized in that: Each of the convex parts is provided with a top surface connected between the limiting surface and the introduction surface; the top surface is connected to the limiting surface via a rounded corner, and / or the top surface is connected to the introduction surface via a rounded corner; The radius of the fillet is in the range of 0.1 mm to 0.5 mm.

5. The joint structure according to claim 2, characterized in that: The longitudinal section profile of the first type of protrusion along the axial direction of the joint body is trapezoidal, and the longitudinal section profile of the second type of protrusion along the axial direction of the joint body is triangular.

6. The joint structure according to claim 5, characterized in that: The first type of protrusions includes two of the protrusions, and the second type of protrusions includes one or more of the protrusions.

7. The joint structure according to any one of claims 1 to 6, characterized in that: A first limiting portion is also provided on the outer wall of the connector body. The first limiting portion and the connecting structure are sequentially arranged along the installation direction of the hose, and the maximum outer diameter of the first limiting portion is greater than the maximum outer diameter of the convex portion.

8. The joint structure according to claim 7, characterized in that: A second limiting portion is further provided on the outer wall of the joint body, the connecting structure is located between the first limiting portion and the second limiting portion, and the maximum outer diameter of the second limiting portion is greater than the maximum outer diameter of the convex portion.

9. The joint structure according to claim 8, characterized in that: The connection structure comprises a starting end connected to the first limiting portion and a terminating end connected to the second limiting portion, and the recess is disposed at both the starting end and the terminating end.

10. The joint structure according to claim 8, characterized in that: The longitudinal section profile of the first limiting portion along the axial direction of the joint body is in an arc shape, and / or the longitudinal section profile of the second limiting portion along the axial direction of the joint body is in an arc shape.

11. The joint structure according to claim 1, characterized in that: The outer diameter of the recess is not less than the inner diameter of the hose; and / or, the number of the recesses is at least two, and the width of the recesses in the hose installation direction is 2 mm; And / or, the distance between the bottom end of the concave portion and the top end of the convex portion ranges from 0.2 mm to 0.5 mm.

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