Union joints for connecting bends and pipe connection systems

Abstract

This utility model discloses a swivel joint connection elbow and pipe connection system, relating to the field of pipe connection technology. By setting a limiting protrusion, the nut connector can be directly and swivelly fixed to the connecting elbow body without pressing the nut. This achieves unidirectional limiting of the limiting protrusion on the connecting elbow body by the limiting connection end of the nut connector. When the pipe is installed inside the nut connector, the pipe and the nut connector achieve bidirectional limiting of the connecting elbow body, effectively preventing the pipe, nut connector, and connecting elbow body from detaching from each other. In addition, the cooperation of the sealing boss and the annular gasket ensures a seal at the connection point of the swivel joint elbow, guaranteeing its connection effect.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, and more specifically, to a flexible joint connection bend and pipe connection system. Background Technology

[0002] In modern industrial piping systems and building water supply and drainage engineering, pipe connections are a crucial link in achieving fluid transmission. Due to the complexity of the construction environment and limitations in installation precision, the pipe axis often exhibits varying degrees of deflection during actual installation. Traditional rigid connection methods mainly employ flanges, threads, or socket joints, which require high coaxiality of the pipes. When there is an angular deviation in the connected pipes, it is difficult to guarantee the connection effect. Furthermore, to ensure that the pipe body and nut are relatively fixed after connection, the crimping manufacturing process of the nut in traditional connection structures can create lattice distortion within the metal. This microstructural defect may develop into fatigue crack initiation under long-term alternating stress, seriously affecting the service life of the piping system.

[0003] In view of this, the present utility model is hereby proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a flexible connection system for bends and pipes.

[0005] This utility model is implemented as follows:

[0006] In a first aspect, this utility model provides a flexible connecting bend, including a connecting bend body, an annular washer, and a nut connector.

[0007] The two ends of the connecting bend body are the first connecting end and the second connecting end, respectively. The first connecting end is configured to be sleeved with the pipe, and the second connecting end is configured to be sleeved with the nut connector.

[0008] It also includes a limiting protrusion that protrudes radially from the end face of the second connecting end. The limiting protrusion is a discontinuous protrusion and includes at least two symmetrically arranged limiting protrusions. One end of the nut connector is a limiting connecting end. The inner diameter of the limiting connecting end is smaller than the inner diameter of the nut connector. The limiting protrusion is accommodated in the nut connector and contacts and limits the limiting connection end.

[0009] It also includes a sealing boss that protrudes from the end face of the second connection end along the axial direction, an annular gasket is disposed on the end face of the second connection end and covers the sealing boss, and the annular gasket is located inside the nut connector.

[0010] In an optional implementation, the side surface on which the limiting protrusion connects to the connecting bend body is an inclined surface.

[0011] In an optional embodiment, the protrusion height of the limiting protrusion is 1 to 2 mm.

[0012] In an optional embodiment, there are two limiting protrusions, which are symmetrically arranged, and the arc length of each limiting protrusion is 1 / 4 to 1 / 3 of the circumference of the end face of the second connecting end.

[0013] In an optional embodiment, the sealing boss is a dovetail boss, and one end of the annular gasket is provided with a dovetail groove, in which the dovetail boss is accommodated.

[0014] In an optional embodiment, the outer diameter of the dovetail boss increases sequentially along the direction away from the second connecting end.

[0015] In an optional implementation, the nut connector has an internal thread.

[0016] Secondly, this utility model provides a pipe connection system, including two pipes to be connected and a union connection bend as described in any of the foregoing embodiments, wherein one pipe is sleeved with a first connection end and the other pipe is accommodated in a nut connector at a second connection end.

[0017] This utility model has the following beneficial effects:

[0018] This invention provides a swivel joint connection system for bends and pipes. By setting a limiting protrusion, the nut connector can be directly and swivelly fixed to the bend body without pressing the nut. This achieves unidirectional limiting of the limiting protrusion on the bend body by the limiting connection end of the nut connector. When the pipe is installed inside the nut connector, the pipe and the nut connector achieve bidirectional limiting of the bend body, effectively preventing the pipe, nut connector, and bend body from detaching from each other. Furthermore, the cooperation of the sealing boss and the annular gasket ensures a seal at the joint of the swivel joint bend, guaranteeing its connection effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the flexible joint connecting bend provided in an embodiment of the present utility model;

[0021] Figure 2 A cross-sectional view of the flexible connecting bend provided in an embodiment of this utility model;

[0022] Figure 3This is a structural schematic diagram of the connecting bend body provided in an embodiment of the present utility model;

[0023] Figure 4 A top view of the connecting bend body provided in an embodiment of this utility model;

[0024] Figure 5 A cross-sectional view of the nut connector provided in an embodiment of this utility model;

[0025] Figure 6 A cross-sectional view of the annular gasket provided in an embodiment of this utility model.

[0026] Explanation of main component symbols: 100-Joint connecting bend; 110-Connecting bend body; 111-First connecting end; 112-Second connecting end; 113-Limiting protrusion; 114-Sealing boss; 115-Inclined surface; 120-Annular gasket; 121-Dovetail groove; 130-Nut connector; 131-Limiting connecting end. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example

[0034] Please refer to Figure 1 and Figure 2 This embodiment provides a flexible connecting bend 100, including a connecting bend body 110, an annular gasket 120 and a nut connector 130.

[0035] Please refer to Figure 3 The two ends of the connecting bend body 110 are respectively the first connecting end 111 and the second connecting end 112. The first connecting end 111 is configured to be sleeved with the pipe, and the second connecting end 112 is configured to be sleeved with the nut connector 130 to realize the connection of the two pipes.

[0036] Please refer to Figure 4 It also includes a limiting protrusion that protrudes radially from the end face of the second connecting end 112. The limiting protrusion is a discontinuous protrusion and includes at least two symmetrically arranged limiting protrusions 113.

[0037] In this embodiment, there are two limiting protrusions 113, which are symmetrically arranged. The arc length of each limiting protrusion 113 is 1 / 4 of the circumference of the end face of the second connecting end 112.

[0038] In this embodiment, the protrusion height of the limiting protrusion 113 is 1.2mm. By controlling the protrusion height of the limiting protrusion 113 within the above range, it can be ensured that the connecting bend body 110 can be smoothly installed into the nut connector 130.

[0039] In other embodiments, there may be three, four, five, six or more limiting protrusions 113, with multiple limiting protrusions 113 spaced apart, and the size of each limiting protrusion 113 can be adjusted as needed.

[0040] Please refer to Figure 5 One end of the nut connector 130 that passes through is a limiting connection end 131. The inner diameter of the limiting connection end 131 is smaller than the inner diameter of the nut connector 130 that passes through. Please refer to the reference section. Figure 2 The limiting protrusion is accommodated within the nut connector 130 and contacts the limiting connection end 131 for limiting.

[0041] Please refer to Figure 4 In this embodiment, the side surface on which the limiting protrusion 113 connects to the connecting bend body 110 is an inclined surface 115.

[0042] By setting the inclined surface 115 and controlling the inclination angle of the inclined surface 115 within the above range, the second connecting end 112 of the connecting pipe body 110 can be limited by the limiting protrusion 113, while also facilitating the connection between the connecting pipe body 110 and the second connecting end 112.

[0043] Please refer to Figure 3 It also includes a sealing boss 114 that protrudes from the end face of the second connecting end 112 along the axial direction, an annular gasket 120 is disposed on the end face of the second connecting end 112 and covers the sealing boss 114, and the annular gasket 120 is located inside the nut connector 130.

[0044] The sealing boss 114 is raised, and in conjunction with the sealing boss 114, the flexible connection bend 100 is sealed at the sealing boss 114 and the annular gasket 120, ensuring the stability of its connection.

[0045] In this embodiment, to improve the sealing effect of the union-connected bend 100, the sealing boss 114 is a dovetail boss, and one end of the annular gasket 120 is provided with a dovetail groove 121 (e.g., Figure 6 As shown), the dovetail boss is accommodated in the dovetail groove 121.

[0046] In this embodiment, the outer diameter of the dovetail boss increases sequentially along the direction away from the end face of the second connecting end 112.

[0047] In this embodiment, the nut connector 130 has an internal thread, and the annular washer 120 is a soft pad with a sealing function.

[0048] The working principle of the union-connecting elbow 100 provided in this embodiment when applied to a pipeline connection system is as follows:

[0049] Install the annular washer 120 on the dovetail boss, and then insert the second connecting end 112 of the connecting bend body 110 into the nut connector 130. During the insertion process, the connecting bend body 110 can be tilted. First, insert the limiting protrusion 113 on one side into the nut connector 130, and then keep the connecting bend body 110 tilted and insert the limiting protrusion 113 on the other side into the nut connector 130 to complete the assembly of the live-joint connecting bend 100.

[0050] One of the pipes to be connected is fitted onto the first connecting end 111, and the other pipe to be connected is accommodated in the nut connector 130 at the second connecting end 112, thus completing the connection of the two pipes.

[0051] This embodiment provides a union-connected elbow 100, which reduces installation space through its elbow structure and is suitable for pipe connections with irregular angles. Simultaneously, the elbow body 110 and the nut connector 130 are positioned by a limiting protrusion 113 and a limiting connection end 131, achieving controlled installation without crimping. This significantly reduces the risk of stress cracking in the nut caused by crimping, decreasing the risk by more than 20% and improving the stress resistance of the union-connected elbow 100. This structure is easy to install, improves work efficiency, and reduces production costs, making it highly valuable for application.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A union-connected bend pipe, characterized in that, Includes the connecting pipe body, annular gasket, and nut connector; The two ends of the connecting bend body are a first connecting end and a second connecting end, respectively. The first connecting end is configured to be sleeved with the pipe, and the second connecting end is configured to be sleeved with the nut connector. It also includes a limiting protrusion that protrudes radially from the end face of the second connecting end. The limiting protrusion is a discontinuous protrusion and includes at least two symmetrically arranged limiting protrusions. One end of the nut connector is a limiting connecting end. The inner diameter of the limiting connecting end is smaller than the inner diameter of the nut connector. The limiting protrusion is accommodated in the nut connector and contacts and limits the limiting connection end. It also includes a sealing boss that protrudes from the end face of the second connecting end along the axial direction, the annular gasket is disposed on the end face of the second connecting end and covers the sealing boss, and the annular gasket is located inside the nut connector.

2. The flexible connecting bend according to claim 1, characterized in that, The side surface on which the limiting protrusion connects to the connecting bend body is an inclined surface.

3. The flexible connecting bend according to claim 2, characterized in that, The protrusion height of the limiting protrusion is 1-2 mm.

4. The flexible joint connecting bend according to claim 1, characterized in that, There are two limiting protrusions, which are symmetrically arranged. The arc length of each limiting protrusion is 1 / 4 to 1 / 3 of the circumference of the end face of the second connecting end.

5. The flexible joint connecting bend according to claim 1, characterized in that, The sealing boss is a dovetail boss, and one end of the annular gasket is provided with a dovetail groove, in which the dovetail boss is accommodated.

6. The flexible joint connecting bend according to claim 5, characterized in that, The outer diameter of the dovetail boss increases sequentially along the direction away from the end face of the second connecting end.

7. The flexible joint connecting bend according to claim 1, characterized in that, The nut connector has an internal thread.

8. A pipe connection system, characterized in that, It includes two pipes to be connected and a union connection bend as described in any one of claims 1 to 7, wherein one of the pipes is sleeved with the first connection end, and the other pipe is accommodated in the nut connector at the second connection end.

Images