A pipe bend and connecting joint

Abstract

This application relates to the field of automotive connector technology, and provides a bent pipe joint and a connecting joint, which can be used to connect with a mating joint. The bent pipe joint includes a mating portion and a main body portion. The mating portion allows the end of the mating joint to be inserted. The main body portion is connected to the mating portion, and the end face of the main body portion away from the mating portion is perpendicular to the end face of the mating joint. Furthermore, the sidewall of the main body portion located on the outer side in the bending direction includes an arc-shaped segment and a main body segment connected sequentially. The first end of the arc-shaped segment corresponds to the lower sidewall of the mating joint, and the second end of the arc-shaped segment corresponds to the upper sidewall of the mating joint, with the arc-shaped segment and the main body segment smoothly transitioning together. With the above configuration, a low-resistance bent pipe joint and a connecting joint can be provided.

Description

Technical Field

[0001] This application relates to the field of automotive connector technology, and more particularly to a pipe bend connector and a connecting joint. Background Technology

[0002] Pipe bends are an important component in the fuel system of gasoline vehicles and the thermal management system of electric vehicles, and are often used to achieve efficient transmission of high-flow-rate, high-viscosity fluids.

[0003] Existing technologies often use right-angle bends to change the direction of fluid flow. During this process, the fluid needs to overcome inertial and frictional forces to change direction, which can lead to significant energy loss and increase the overall pressure loss of the system. Furthermore, turbulence and eddies are easily formed at right-angle bends, resulting in increased local drag.

[0004] Therefore, a low-flow-resistance bend fitting is needed. Utility Model Content

[0005] This application provides a pipe bend joint and a connecting joint to solve the problem that existing pipe bend joints are prone to turbulence and eddies, resulting in energy loss and affecting the system pressure stability.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] The first aspect of this application provides a bend pipe joint for connection with a mating joint. The bend pipe joint includes: a mating portion into which an end of the mating joint can be inserted; and a main body portion connected to the mating portion, wherein the end face of the main body portion away from the mating portion is perpendicular to the end face of the mating joint; wherein the sidewall of the main body portion located on the outer side in the bending direction includes an arc-shaped segment and a main body segment connected in sequence; the first end of the arc-shaped segment corresponds to the lower sidewall of the mating joint, the second end of the arc-shaped segment corresponds to the upper sidewall of the mating joint, and the arc-shaped segment and the main body segment are smoothly connected.

[0008] As an optional implementation, the arc segment and the main body segment together form the first circular arc segment.

[0009] As an optional implementation, a second arc segment is provided on the side wall of the main body located on the inner side in the bending direction, and the center of the second arc segment is the same as that of the first arc segment.

[0010] As an optional implementation, the top of the side wall of the main body located inside the bending direction is provided with an outward expansion section, which is connected to the second arc segment and extends in the bending direction.

[0011] As an alternative implementation, a stop boss is provided on the inner wall of the mating part near the main body, and the mating joint can be stopped by the stop boss.

[0012] A second aspect of this application provides a connecting joint, including a mating joint and a bend joint as described above, wherein the bend joint and the mating joint are detachably connected.

[0013] As an optional implementation, it also includes a seal that fits tightly between the mating part and the mating joint.

[0014] As an optional implementation, it further includes: a safety ring, which is installed between the mating part and the mating joint, and the safety ring is located on the side of the seal away from the main body; and a limiting protrusion is provided circumferentially on the inner wall of the mating part, the limiting protrusion abutting against the end face of the safety ring away from the seal.

[0015] As an optional implementation, the safety ring includes: an annular seat and multiple toothed structures; the multiple toothed structures are all connected to the annular seat, and each toothed structure is spaced apart along the circumference of the annular seat.

[0016] As an optional implementation, the connector also includes a clamp, which is installed on the mating part; the mating part has an opening groove, through which the clamp can pass and be engaged in the groove of the mating connector.

[0017] The elbow joint and connecting joint provided in this application can be used to connect with a mating joint. The elbow joint includes a mating part and a main body part. The mating part allows the end of the mating joint to be inserted. The main body part is connected to the mating part, and the end face of the main body part away from the mating part is perpendicular to the end face of the mating joint.

[0018] Furthermore, the sidewall located on the outer side in the bending direction of the main body comprises an arc-shaped segment and a main body segment connected in sequence. The first end of the arc-shaped segment corresponds to the lower sidewall of the mating joint, and the second end of the arc-shaped segment corresponds to the upper sidewall of the mating joint, with the arc-shaped segment and the main body segment smoothly transitioning and connecting.

[0019] With the above configuration, since the sidewall located on the outer side of the bending direction in the main body includes an arc-shaped segment and a main body segment connected in sequence, when the fluid flows from the mating joint to the bend joint, the fluid can flow out between the upper and lower sidewalls of the mating joint, and after flowing out, it comes into contact with the arc-shaped segment and gradually turns and changes direction under the guidance of the arc-shaped segment.

[0020] This allows the fluid to flow along a smooth curved path without abrupt changes in direction, reducing inertial and frictional forces and thus minimizing kinetic energy loss. Simultaneously, the curved section reduces the likelihood of flow separation, thereby lowering the probability of eddies and turbulence, and consequently reducing flow resistance.

[0021] Alternatively, when fluid flows from the bend joint to the mating joint, since the arc section and the main body section of the bend joint are smoothly connected, the fluid flows along the smooth curve after entering the bend joint, and gradually turns in the arc section before finally flowing into the mating joint. This also achieves low flow resistance between the bend joint and the mating joint. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram illustrating the connection between the bend joint and the mating joint provided in the embodiments of this application;

[0024] Figure 2 for Figure 1 Cross-sectional view of the bend joint and mating joint along line AA;

[0025] Figure 3 for Figure 1 A cross-sectional view of the pipe bend joint along line AA;

[0026] Figure 4 A three-dimensional structural diagram of the pipe bend provided in the embodiments of this application;

[0027] Figure 5 A three-dimensional structural diagram of the safety ring provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the connection between the clamp and the mating joint provided in the embodiments of this application;

[0029] Figure 7 This is a schematic diagram of the connection between the clamp and the bend joint provided in the embodiments of this application;

[0030] Figure 8 This is a cross-sectional view of the connection between the connector and the nylon tube provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10-Bend fitting;

[0033] 110 - Main body; 111 - Arc-shaped segment; 112 - Main body segment; 113 - First arc segment; 114 - Second arc segment; 115 - Outward expansion segment; 116 - Flange structure; 117 - Bamboo joint structure;

[0034] 120 - Mating part; 121 - Stopping boss; 1211 - First straight wall; 1212 - Intermediate connecting wall; 1213 - Second straight wall; 122 - Groove; 123 - Step surface; 124 - Limiting protrusion; 125 - Guide groove; 126 - Opening groove;

[0035] 20 - Mating connector; 210 - Guide protrusion; 220 - Slot;

[0036] 30 - Seals;

[0037] 40 - Safety ring; 410 - Annular seat; 420 - Toothed structure; 4211 - Mating protrusion;

[0038] 50-clamp;

[0039] 60-Nylon tubing. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] Pipe bends are an important component in the fuel system of gasoline vehicles and the thermal management system of electric vehicles, and are often used to achieve efficient transmission of high-flow-rate, high-viscosity fluids.

[0042] Existing technologies often use right-angle bends to change the direction of fluid flow. During this process, the fluid needs to overcome inertial and frictional forces to change direction, which can lead to significant energy loss and increase the overall pressure loss of the system. Furthermore, turbulence and eddies are easily formed at right-angle bends, resulting in increased local drag.

[0043] To overcome the deficiencies in the prior art, this application provides a pipe bend connector and a connecting connector, the pipe bend connector being used to connect with a mating connector. The pipe bend connector includes a mating portion and a main body portion. The mating portion allows the end of the mating connector to be inserted. The main body portion is connected to the mating portion, and the end face of the main body portion away from the mating portion is perpendicular to the end face of the mating connector.

[0044] Furthermore, the sidewall located on the outer side in the bending direction of the main body comprises an arc-shaped segment and a main body segment connected in sequence. The first end of the arc-shaped segment corresponds to the lower sidewall of the mating joint, and the second end of the arc-shaped segment corresponds to the upper sidewall of the mating joint, with the arc-shaped segment and the main body segment smoothly transitioning and connecting.

[0045] With the above configuration, since the sidewall located on the outer side of the bending direction in the main body includes an arc-shaped segment and the main body segment, when the fluid flows from the mating joint to the bend joint, the fluid can flow out between the upper and lower sidewalls of the mating joint, and after flowing out, it contacts the arc-shaped segment and gradually changes direction under the guidance of the arc-shaped segment. This allows the fluid to flow along a smooth curved path, with a sudden change in direction, reducing inertial forces and friction, thereby reducing the fluid's kinetic energy loss. At the same time, the arc-shaped segment can also reduce the possibility of flow separation, thereby reducing the probability of eddies and turbulence, and further reducing the fluid's flow resistance.

[0046] Alternatively, when fluid flows from the bend joint to the mating joint, since the arc section and the main body section of the bend joint are smoothly connected, the fluid flows along the smooth curve after entering the bend joint, and gradually turns in the arc section before finally flowing into the mating joint. This also achieves low flow resistance between the bend joint and the mating joint.

[0047] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0048] Figure 1 This is a schematic diagram of the connection between the bend joint and the mating joint provided in the embodiments of this application. Figure 2 for Figure 1 The sectional view of the bend joint and mating joint along line AA.

[0049] Reference Figure 1 and Figure 2 As shown, this application embodiment provides a bent pipe connector 10, which is used to connect with a mating connector 20. The bent pipe connector 10 includes a mating portion 120 and a main body portion 110. The mating portion 120 allows the end of the mating connector 20 to be inserted. The main body portion 110 is connected to the mating portion 120, and the end face of the main body portion 110 away from the mating portion 120 is perpendicular to the end face of the mating connector 20. Thus, when the mating connector 20 is inserted into the mating portion 120 of the bent pipe connector 10, a 90° reversal of the fluid flow direction within the mating connector 20 can be achieved through the bent pipe connector 10.

[0050] The sidewall of the main body 110 located on the outer side in the bending direction includes an arc-shaped segment 111 and a main body segment 112 connected in sequence. The first end of the arc-shaped segment 111 corresponds to the lower sidewall of the mating joint 20, and the second end of the arc-shaped segment 111 corresponds to the upper sidewall of the mating joint 20. The arc-shaped segment 111 and the main body segment 112 are smoothly connected.

[0051] Thus, since the sidewall of the main body 110 located on the outer side in the bending direction includes an arc-shaped segment 111, when the fluid flows from the mating joint 20 to the bend joint 10, the fluid can flow out between the upper and lower sidewalls of the mating joint 20, and after flowing out, it contacts the arc-shaped segment 111, and gradually changes direction under the guidance of the arc-shaped segment 111. This allows the fluid to flow along a smooth curved path without sudden changes in direction, reducing inertial forces and friction, thereby reducing the loss of kinetic energy. At the same time, the arc-shaped segment 111 can also reduce the possibility of flow separation, thereby reducing the probability of eddies and turbulence, and further reducing the flow resistance of the fluid.

[0052] Alternatively, when fluid flows from the bend joint 10 to the mating joint 20, since the arc section 111 and the main body section 112 in the bend joint 10 are smoothly connected, after the fluid enters the bend joint 10, it flows along a smooth curve and gradually turns at the arc section 111, eventually flowing into the mating joint 20. This also achieves low flow resistance flow of fluid between the bend joint 10 and the mating joint 20.

[0053] It is understandable that the outer side of the bending direction refers to the side away from the center of curvature, while the inner side of the bending direction refers to the side closer to the center of curvature. Furthermore, the radius of curvature on the outer side of the bending direction is always greater than the radius of curvature on the inner side of the bending direction.

[0054] Combination Figure 2 As shown, arc segment 111 and main body segment 112 correspond to segments AB and BC, respectively. It can be understood that the radii of curvature of segments AB and BC can be the same or different, as long as they can achieve a smooth transition connection; no restrictions are imposed on them here.

[0055] The height h corresponding to the arc segment 111 (AB segment) is the same as the inner diameter d of the mating joint 20, so that the high-velocity fluid flowing out of the mating joint 20 can gradually change direction along the arc segment 111 and smoothly transition to the main body segment 112, thereby reducing the kinetic energy loss of the fluid flowing between the joints and reducing the possibility of eddies and turbulence.

[0056] In one implementation, the arc segment 111 and the main body segment 112 together form the first circular arc segment 113. That is, the arc segment 111 and the main body segment 112 have the same radius of curvature.

[0057] This not only reduces the cost of customized processing and facilitates the manufacturing and processing of the bend joint 10, but also allows the fluid to maintain a streamlined flow, avoiding the possibility of eddies or separation zones caused by different curvatures, thereby further reducing local resistance losses.

[0058] Continue to refer to Figure 2As shown, a second arc segment 114 is provided on the inner sidewall of the main body 110 in the bending direction, and the centers of the first arc segment 113 and the second arc segment 114 are the same. This ensures that the difference in curvature radii between the first arc segment 113 and the second arc segment 114 remains constant, allowing the flow channel cross-section to gradually transition to a stable state after a smooth turn, avoiding drastic flow velocity fluctuations caused by abrupt changes in cross-section, thereby reducing the risk of flow separation and eddy current generation. Furthermore, the first arc segment 113 and the second arc segment 114 can be formed using an arc core-pulling process, which is beneficial for mass production.

[0059] For example, the top of the side wall of the main body 110 located inside the bending direction may be provided with an outward expansion section 115, which is connected to the second arc segment 114 and extends in the bending direction.

[0060] In this way, the end of the main body 110 away from the mating joint 20 can be expanded outward, so that the fluid can flow more smoothly into or out of the mating pipe under the guidance of the expanded section 115.

[0061] As one implementation, the first arc segment 113 and the second arc segment 114 can be processed using polishing or coating techniques to further reduce the frictional resistance when the fluid comes into contact with the inner wall during flow.

[0062] Figure 3 for Figure 1 A cross-sectional view of the bend in the pipe along line AA. Figure 4 This is a three-dimensional structural diagram of the pipe bend provided in the embodiment of this application.

[0063] Combination Figure 2 , Figure 3 As shown, a stop boss 121 protrudes from the inner wall of the mating part 120 near the main body 110, and the mating joint 20 can stop against the stop boss 121. It can be understood that the projection of the mating part 120 in the height direction coincides with the projection of the stop boss 121 in the height direction.

[0064] It should be noted that, generally speaking, the mating joint 20 does not directly abut against the stop boss 121. Only when the mating joint 20 has a large manufacturing tolerance can the stop boss 121 act as a stop to prevent the mating joint 20 from extending into the main body 110. In addition, the stop boss 121 can also stop the pipe being tested during airtightness testing.

[0065] For example, refer to Figure 4As shown, the inner wall of the stop protrusion includes a first straight wall 1211, an intermediate connecting wall 1212, and a second straight wall 1213. The intermediate connecting wall 1212 is arc-shaped and connects at the point of maximum curvature, and extends towards the side walls of the mating portion 120. The first straight wall 1211 and the second straight wall 1213 are respectively connected to the two ends of the intermediate connecting wall 1212 and extend in a straight line to the top wall of the mating portion 120.

[0066] This application embodiment also provides a connecting connector, which may include a mating connector 20 and a bend connector 10 as described above. The bend connector 10 and the mating connector 20 are detachably connected. Therefore, the bend connector 10 can be replaced in a timely manner.

[0067] Continue to refer to Figure 2 As shown, the connecting joint may also include a seal 30. The seal 30 fits tightly between the mating part 120 and the mating joint 20.

[0068] The seal 30 is installed on the mating part 120 and can seal the connection between the elbow joint 10 and the mating joint 20 to prevent fluid leakage between the inner wall of the mating part 120 and the outer wall of the mating joint 20. Specifically, the seal 30 can be an O-ring.

[0069] For example, the inner wall of the mating part 120 may be provided with a groove 122, and the sealing member 30 is filled in the groove 122 and can abut against the groove 122. When the mating joint 20 is connected to the elbow joint 10, the gap between the two can be filled by the elastic deformation of the sealing member 30.

[0070] The connecting joint may also include a safety ring 40. The safety ring 40 is installed between the mating part 120 and the mating joint 20, and the safety ring 40 is located on the side of the seal 30 opposite to the body part 110. The safety ring 40 can be used to limit the axial displacement of the mating joint 20.

[0071] The outer wall of the safety ring 40 can abut against the inner wall of the mating part 120. Specifically, the inner wall of the mating part 120 can be provided with a stepped surface 123. The outer contour of the safety ring 40 can abut against the stepped surface 123. Furthermore, a limiting protrusion 124 is provided circumferentially on the inner wall of the mating part 120 (see...). Figure 3 As shown), the limiting protrusion 124 abuts against the side end face of the safety ring 40 away from the seal 30.

[0072] In this way, the axial positioning of the safety ring 40 can be achieved by the engagement of the limiting protrusion 124 with the inner wall of the mating part 120.

[0073] Figure 5 This is a three-dimensional structural diagram of the safety ring provided in an embodiment of this application. (Refer to...) Figure 5As shown, the safety ring 40 may include an annular seat 410 and multiple toothed structures 420. The multiple toothed structures 420 are all connected to the annular seat 410, and the toothed structures 420 are spaced apart circumferentially along the annular seat 410.

[0074] In this way, when the mating joint 20 is assembled with the elbow joint 10, the outer wall of the mating joint 20 is pressed against multiple toothed structures 420. Under the action of the extrusion force, the multiple toothed structures 420 can deform relative to the central axis of the safety ring 40. At this time, the extrusion force applied by the mating joint 20 is distributed to each toothed structure 420. Compared with the entire inner wall of the safety ring 40 being compressed by the mating joint 20, the safety ring 40 designed in this way has a certain deformation capacity and is not easy to crack after being compressed, thereby improving the reliability of the safety ring 40.

[0075] For example, the toothed structure 420 is provided with a mating protrusion 4211. The top wall of the mating protrusion 4211 near the end of the annular seat 410 can abut against the stepped surface 123 to achieve positioning of the safety ring 40.

[0076] Figure 6 This is a schematic diagram of the connection between the clamp and the mating joint provided in the embodiments of this application. Figure 7 This is a schematic diagram of the connection between the clamp and the bend joint provided in the embodiment of this application.

[0077] Combination Figure 6 and Figure 7 As shown, the connecting joint also includes a clamp 50. The clamp 50 is installed on the mating part 120 and can be used to realize a detachable connection between the bend joint 10 and the mating joint 20. It is understood that the clamp 50 can be snapped onto the outer wall of the mating part 120 to realize installation on the mating part 120, which will not be described in detail here. The mating part 120 has an opening slot 126, and the clamp 50 can pass through the opening slot 126 and be snapped into the slot 220 of the mating joint 20.

[0078] For example, the outer wall of the mating part 120 may have two opening slots 126, which are arranged opposite each other along the circumference of the mating part 120. The two sides of the clamp 50 can pass through the two opening slots 126 respectively and be engaged in the slots 220 of the mating joint 20. Thus, the mating joint 20 can be installed in the bend joint 10 by means of the clamp 50, and there will be no relative slippage between the two.

[0079] Continue to refer to Figure 6 and Figure 7 As shown, in one embodiment, one of the mating portions 120 of the mating joint 20 and the bend joint 10 is provided with a guide groove 125, and the other is provided with a guide protrusion 210.

[0080] Thus, the relative positioning between the mating joint 20 and the bend joint 10 can be achieved through the engagement of the guide groove 125 and the positioning protrusion, and the mating joint 20 can be prevented from rotating relative to the bend joint 10.

[0081] For example, such as Figure 3 As shown, a guide groove 125 may be formed on the inner wall of the mating part 120, and the guide groove 125 is located at the end away from the transition part. Correspondingly, a guide protrusion 210 may be provided on the outer wall of the mating joint 20. Alternatively, the inner wall of the mating part 120 may be provided with a guide protrusion, and the outer wall of the mating joint 20 may be provided with a guide groove; no specific limitation is made here.

[0082] For example, the inner wall of the mating part 120 is provided with a guide groove 125, and the outer wall of the mating joint 20 may be provided with a guide protrusion 210.

[0083] When the mating joint 20 is installed on the bend joint 10, the guide protrusion 210 is slidably connected to the guide groove 125 and eventually abuts against the bottom of the guide groove 125. Thus, the insertion depth of the mating joint 20 can be limited by setting the groove depth of the guide groove 125.

[0084] Furthermore, there can be two guide grooves 125, which can be respectively located on opposite sides of the inner wall of the mating part 120 in the circumferential direction. Also, the depths of the two guide grooves 125 can be different.

[0085] This further strengthens the restriction on the rotation of the mating joint 20, and the mating joint 20 can only be inserted into the elbow joint 10 in one direction, thereby preventing misassembly.

[0086] Figure 8 This is a cross-sectional view of the connection between the connector and the nylon tube provided in an embodiment of this application.

[0087] Reference Figure 8 As shown, the end of the elbow joint 10 away from the mating joint 20 can be connected to the nylon tube 60. Furthermore, a seal 30 can be provided between the nylon tube 60 and the elbow joint 10 to prevent fluid leakage at the connection point.

[0088] In some embodiments, the outer wall of the main body 110 has a flange structure 116 protruding therefrom, which can abut against the end face of the nylon tube 60 to achieve positioning of the nylon tube 60.

[0089] In some embodiments, a plurality of bamboo-joint structures 117 may be arranged side by side on the outer wall of the end of the main body 110 away from the mating part 120. This can improve the pull-out resistance between the bend joint 10 and the nylon tube 60, and further improve the sealing performance of the connection between the nylon tube 60 and the main body 110.

[0090] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0091] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0092] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0093] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A bendable pipe fitting for connection with a mating fitting, characterized in that, The bend fitting includes: A mating part, wherein the mating part allows the end of the mating joint to be inserted; The main body is connected to the mating part, and the end face of the main body away from the mating part is perpendicular to the end face of the mating joint. The sidewall located on the outer side of the main body in the bending direction includes an arc-shaped segment and a main body segment connected in sequence; the first end of the arc-shaped segment corresponds to the lower sidewall of the mating joint, the second end of the arc-shaped segment corresponds to the upper sidewall of the mating joint, and the arc-shaped segment and the main body segment are smoothly connected.

2. The pipe bend joint according to claim 1, characterized in that, The arc segment and the main body segment together form the first circular arc segment.

3. The pipe bend joint according to claim 2, characterized in that, The main body has a second arc segment on the side wall located inside the bending direction, and the center of the second arc segment is the same as that of the first arc segment.

4. The pipe bend joint according to claim 3, characterized in that, The main body has an outwardly expanding section at the top of the side wall located inside the bending direction. The outwardly expanding section is connected to the second arc segment and extends in the bending direction.

5. The pipe bend fitting according to any one of claims 1-4, characterized in that, The inner wall of the mating part is provided with a stop protrusion, and the mating joint can be stopped by the stop protrusion.

6. A connecting connector, characterized in that, It includes a mating joint and a bend joint as described in any one of claims 1-5, wherein the bend joint is detachably connected to the mating joint.

7. The connecting joint according to claim 6, characterized in that, Also includes: A sealing element that fits tightly between the mating part and the mating joint.

8. The connecting joint according to claim 7, characterized in that, Also includes: A safety ring is installed between the mating part and the mating joint, and the safety ring is located on the side of the seal that is away from the main body. Furthermore, a limiting protrusion is provided circumferentially on the inner wall of the mating part, and the limiting protrusion abuts against the end face of the safety ring away from the seal.

9. The connecting joint according to claim 8, characterized in that, The safety ring includes: an annular seat and multiple toothed structures; The plurality of toothed structures are all connected to the annular seat, and each of the toothed structures is spaced apart along the circumference of the annular seat.

10. The connecting joint according to claim 6, characterized in that, The connecting joint also includes a clamp, which is installed on the mating part; The mating part has an opening groove, and the clamp can pass through the opening groove and be engaged in the groove of the mating joint.

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