A pipe quick coupling
Patent Information
- Application Number
- CN202522403465.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-11-12
AI Technical Summary
[0002]接头是管路搭建连接必不可少的零部件，传统的连接方式包括螺纹连接、法兰螺栓连接、焊接、热熔连接等，虽然连接牢固，但操作费事费力，尤其螺纹连接时，需要至少一边的管道具备转动空间
[0011] The advantages of this utility model are as follows: rotating the buckle handle allows for quick and convenient connection and disassembly of two tubes, making operation easy; the cooperation of the buckle part and the interlocking groove ensures a symmetrical distribution of the buckling force, resulting in more balanced force on the tube connection; the combination of the limit pin and the stop part prevents relative rotation of the tubes, making the connection more stable.
Smart Images
Figure CN224743132U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipeline technology, specifically relating to a quick pipe coupling. Background Technology
[0002] Fittings are essential components for pipeline construction and connection. Traditional connection methods include threaded connections, flange bolt connections, welding, and thermofusion connections. Although these connections are secure, they are time-consuming and labor-intensive, especially threaded connections, which require at least one side of the pipe to have room for rotation. Currently, some quick-connect fittings have emerged, such as snap-fit connections, crimp connections, and self-locking connections. However, these often fail to simultaneously achieve ease of operation, stable stress distribution, and guaranteed sealing performance. Utility Model Content
[0003] Based on the shortcomings of existing technologies, this utility model provides a quick pipe connector that adopts a snap-fit connection design. Through structural improvements, the quick connector of this utility model can achieve more balanced stress distribution, ensuring the stability and sealing performance of the pipes after connection.
[0004] The technical solution adopted by this utility model is as follows: A quick pipe connector includes a first mating end and a second mating end. A fastening handle is pinned to the outer periphery of the opening of the first mating end near the second mating end. The fastening handle is U-shaped and includes two arms and an arc segment connecting the two arms. The arc segment can fit onto the outer diameter of the pipe body section of the first mating end as the fastening handle rotates around the pin joint. The free end of each arm is integrally formed with a pin joint. Each of the two pin joints is pinned to one side of the opening of the first mating end. The pin joints extend a distance away from the arms and form a fastening part at the end. The fastening part is a hook-shaped structure formed inside the pin joint, and the end face of the hook-shaped structure facing the arms is flat.
[0005] A bearing portion is fixedly provided on the outer periphery of the opening near the first docking end of the second docking end. The number of bearing portions corresponds to the number of fastening portions. The end face of each bearing portion away from the first docking end is an arc surface that protrudes along the axial direction of the pipe section. An engagement groove is provided on the arc surface of the bearing portion. The bottom surface of the engagement groove is also an arc surface that protrudes in the middle in the direction away from the first docking end. The width of the engagement groove is the same as the thickness of the fastening portion. When the first docking end and the second docking end are connected together, the fastening portion rotates into the engagement groove and abuts against the middle position of the bottom surface of the engagement groove.
[0006] A threaded hole is provided on the outer periphery of the opening near the second docking end of the first docking end. The threaded hole is a short pin shaft with a threaded blind hole in the center, and a pin is installed in the threaded blind hole. A circular hole is provided on the pin joint of the fastening handle so that the short pin shaft can be fitted into it. The outer diameter of the outer end cap of the pin is larger than the inner diameter of the circular hole to prevent the pin joint from disengaging from the short pin shaft.
[0007] The first mating end has an outwardly extending convex ring formed on its open end face, and the inner circumference of the second mating end is recessed downward to form a stepped portion. The convex ring can extend into the second mating end and abut against the stepped portion. A sealing ring is provided on the stepped portion; or, a sealing groove is formed on the stepped portion, and the sealing groove contains the sealing ring.
[0008] A stop portion is formed on the end face of the open end of the first mating end near the outer peripheral surface. The stop portion extends outward along the axial direction and has a notch. A limit pin is provided on the outer peripheral side of the open end of the second mating end. When the first mating end is connected to the second mating end, the limit pin enters the notch. One or more stop portions are provided, and the number of limit pins is the same as the number of stop portions.
[0009] In another embodiment, the inner circumferential surface of the opening adjacent to the second docking end of the first docking end is formed into an inner conical surface. A one-way shut-off valve assembly is provided inside the pipe section of the first docking end. The one-way shut-off valve assembly includes a mounting base, a check valve core, and a spring. The mounting base has multiple flow holes and is fixedly disposed inside the pipe section of the first docking end. The check valve core is slidably disposed on the mounting base, and a spring is disposed between the mounting base and the check valve core. The spring pushes the check valve core so that the outer conical surface of the check valve core fits against the inner conical surface at the opening.
[0010] The inner circumferential surface of the opening of the second docking end adjacent to the first docking end is also formed into an inner conical surface. The same one-way shut-off valve assembly is also installed inside the tube body of the second docking end. When the first docking end and the second docking end are connected together, the two check valve cores push against each other to compress the spring, so that the channel between the check valve core inside the first docking end and the inner conical surface at the opening of the first docking end is opened, and the channel between the check valve core inside the second docking end and the inner conical surface at the opening of the second docking end is also opened.
[0011] The advantages of this utility model are as follows: rotating the buckle handle allows for quick and convenient connection and disassembly of two tubes, making operation easy; the cooperation of the buckle part and the interlocking groove ensures a symmetrical distribution of the buckling force, resulting in more balanced force on the tube connection; the combination of the limit pin and the stop part prevents relative rotation of the tubes, making the connection more stable. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of the quick-connect pipe fitting of this utility model; Figure 2 This is a schematic diagram of the disassembled state of the quick-connect pipe fitting of this utility model; Figure 3 This is an exploded view of the first mating end structure of the quick connector for pipes of this utility model; Figure 4 This is a schematic diagram of the structure at the port of the first mating end of the quick connector for pipes of this utility model; Figure 5 This is a schematic diagram of the second mating end of the quick-connect pipe fitting of this utility model (view 1). Figure 6 This is a schematic diagram of the second mating end of the quick-connect pipe fitting of this utility model from another perspective. Figure 7 This is a cross-sectional view of another embodiment of the quick-connect pipe fitting of this utility model; In the diagram: 1. First mating end, 2. Second mating end, 3. Snap handle, 4. Pin, 5. Check valve core, 6. Spring, 7. Mounting base; 1-1. Screw hole portion; 1-2. Stop portion; 1-3. Raised ring portion; 2-1. Limiting pin; 2-2. Bearing portion; 2-3. Step portion; 2-4. Engaging groove; 3-1. Pin joint; 3-2. Support arm; 3-3. Fastening part. Detailed Implementation
[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0014] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are for simplification 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.
[0016] Figure 1 This is a schematic diagram of the overall structure of the quick-connect pipe fitting of this utility model; Figure 2 This is a schematic diagram of the disassembled state of the quick-connect pipe coupling of this utility model. As shown in the figure, the quick-connect pipe coupling of this utility model includes a first mating end 1 and a second mating end 2. Both the first mating end 1 and the second mating end 2 are pipe structures, and they are connected together by a snap-fit handle 3 to achieve quick pipe connection. The snap-fit handle 3 is pinned to the first mating end 1, and it rotates around the first mating end 1 about the pin shaft, realizing the locking and unlocking of the first mating end 1 and the second mating end 2. Figure 1 The docking state is achieved through a locking mechanism. Figure 2 It is in the unfastened state, and the first mating end 1 and the second mating end 2 can be separated.
[0017] The following is combined with Figures 3-6 The specific structures of the first docking end 1 and the second docking end 2 are described in detail.
[0018] Figure 3 This is an exploded view of the first mating end structure of the quick-connect pipe coupling of this utility model. Figure 4 This is a schematic diagram of the structure at the port of the first mating end of the quick-connect pipe fitting of this utility model. See [link / reference]. Figure 3 and Figure 4 The first docking end 1 has a screw hole 1-1 on the outer side of one open end of the tube section. Two screw holes 1-1 are symmetrically arranged on both sides of the first docking end 1, and the screw holes 1-1 are integrally formed or fixedly connected to the outer side of the first docking end. The screw hole 1-1 is a pin-connected short shaft with a threaded blind hole in its center. The fastening handle 3 is pinned to the pin-connected short shaft, and the fastening handle 3 is limited by the pin 4 to prevent it from popping out and to not hinder the rotation of the fastening handle 3.
[0019] See Figure 3The main body of the latching handle 3 is U-shaped, including two support arms 3-2 and an arc segment connecting the two support arms 3-2. The arc segment conforms to the outer diameter arc of the tube section of the first docking end 1, so that when the latching handle 3 is in the locked state, the arc segment can conform to the outer surface of the tube section of the first docking end 1. The free end of the support arm 3-2 is integrally formed with a pin connection part 3-1. The pin connection part 3-1 has a circular hole that mates with the screw hole part 1-1, so that the pin connection part 3-1 is sleeved on the screw hole part 1-1. The outer diameter of the end cap of the pin 4 is larger than the diameter of the circular hole. The pin 4 is screwed into the threaded blind hole of the screw hole part 1-1, limiting the pin connection part 3-1 on the screw hole part 1-1. See also Figure 3 and Figure 4 The end of the pin connection 3-1 away from the support arm 3-2 is formed with a fastening part 3-3. Specifically, the end face of the pin connection 3-1 is an arc surface, and a hook-shaped fastening part 3-3 is formed on its inner side. That is, the two fastening parts 3-3 are located on the adjacent sides of the two pin connections 3-1. The end face of the fastening part 3-3 facing the support arm 3-2 is a plane.
[0020] See Figure 4 The first mating end 1 has an axially extending convex ring portion 1-3 formed on its open end face. One or more stop portions 1-2 are formed on the outer side of the convex ring portion 1-3. A gap exists between the stop portions 1-2 and the convex ring portion 1-3. In the illustrated embodiment, two stop portions are symmetrically arranged; however, setting only one or an array of three or more can be appropriately modified based on actual needs. The stop portion 1-2 extends axially outward from the platform on the outer ring side of the convex ring portion 1-3, and a notch is recessed in the stop portion 1-2. Furthermore, the stop portion 1-2 is positioned away from the screw hole portion 1-1 to avoid shape interference that would hinder the rotation of the pin connection portion 3-1 pinned to the screw hole portion 1-1.
[0021] Figure 5 This is a schematic diagram of the second mating end of the quick-connect pipe fitting of this utility model, from one perspective. Figure 6 This is a schematic diagram of the second mating end of the quick-connect pipe fitting of this utility model from another perspective. As shown in the figure, the inner circumference of the pipe body section of the second mating end 2 facing the first mating end 1 is recessed downward to form a step portion 2-3. When the first mating end 1 and the second mating end 2 are connected together, the convex ring portion 1-3 extends into the second mating end 2 and abuts against the step portion 2-3. Obviously, a sealing ring is also placed on the step portion 2-3, or a sealing groove is formed on the step portion 2-3 to accommodate the sealing ring. When the pipes are connected together, the sealing ring is just squeezed between the convex ring portion 1-3 and the step portion 2-3 to ensure the sealing performance when the first mating end 1 and the second mating end 2 are connected together. After the sealing ring has been used for a long time and is excessively deformed, it can be easily disassembled and replaced with a new sealing ring.
[0022] A limiting pin 2-1 is formed on the side wall of the open end of the second docking end 2. The limiting pin 2-1 is a radially extending pin. When the second docking end 2 is connected to the first docking end 1, the limiting pin 2-1 is engaged in the recess of the stop portion 1-2 of the first docking end 1, preventing the first docking end 1 and the second docking end 2 from excessively compressing the sealing ring and preventing them from rotating relative to each other. A bearing portion 2-2 is also fixedly provided on the outer periphery of the tube section of the second docking end 2 facing the first docking end 1. See [reference needed]. Figure 6 The end face of the bearing part 2-2 facing away from the first docking end 1 is an arc surface that protrudes along the axial direction of the pipe section. A meshing groove 2-4 is provided on the arc surface of the bearing part 2-2. The bottom surface of the meshing groove 2-4 is also an arc surface that protrudes along the axial direction of the pipe section. The width of the meshing groove 2-4 is the same as the thickness of the fastening part 3-3. When the first docking end 1 and the second docking end 2 are connected together, the fastening handle 3 is rotated. When the pin part 3-1 of the fastening handle 3 rotates around the screw hole part 1-1, the fastening part 3-3 rotates to approach the bearing part 2-2 and slides into the meshing groove 2-4, quickly connecting the first docking end 1 and the second docking end 2 together.
[0023] See Figure 1 and Figure 2 Along the overall axial direction, the bearing part 2-2 corresponds to the screw hole part 1-1, and the position of the notch of the stop part 1-2 corresponds to the position of the limiting pin 2-1. When the first docking end 1 and the second docking end 2 are docked, the protruding ring part 1-3 of the first docking end 1 extends into the second docking end 2 and abuts against the step part 2-3. The limiting pin 2-1 of the second docking end 2 enters into the notch of the stop part 1-2 of the first docking end 1. At this time, the buckling handle 3 is rotated, and the buckling part 3-3 slides into the inside of the biting groove 2-4 along the biting groove 2-4 of the bearing part 2-2. Since the bottom surface of the biting groove 2-4 gradually rises from both sides to the middle, when the buckling part 3-3 is rotated with the buckling handle 3 until the buckling handle 3 is attached to the tube section of the first docking end 1, the buckling part 3-3 contacts the highest point of the bottom surface of the biting groove 2-4, realizing the quick connection between the first docking end 1 and the second docking end 2.
[0024] In another embodiment, the quick-connect pipe fitting of this invention can be equipped with an automatic shut-off function, such as... Figure 7The diagram shown is a cross-sectional view of another embodiment of the quick-connect pipe fitting of this utility model. A one-way shut-off valve assembly is provided inside both the first mating end 1 and the second mating end 2, including a check valve core 5, a spring 6, and a mounting base 7. The mounting base 7 is threaded or otherwise fixed to the inner diameter of the pipe section. The shaft of the check valve core 5 is slidably disposed within the central through hole of the mounting base 7. The spring 6 is positioned between the mounting base 7 and the check valve core 5. In the unassembled state of the first mating end 1 and the second mating end 2, the elastic force of the spring 6 pushes the check valve core 5 outward. The conical surface of the check valve core 5 engages with the inner conical surface of the opening of the pipe section at the first mating end 1 or the second mating end 2, closing the opening. When the first mating end 1 and the second mating end 2 are connected, the check valve cores 5 of the first mating end 1 and the second mating end 2 push against each other, compressing the spring 6, causing them to move away from the inner conical surface of their respective pipe section openings, presenting... Figure 7 As shown, the fluid flows from the flow hole on the mounting base 7 through the gap between the two check valve cores 5 and their corresponding mating inner conical surfaces, and then through the flow hole on another mounting base 7, thus connecting the fluid in the pipeline.
[0025] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that, based on the technical solution of the present utility model, various modifications or variations of equivalent structures or equivalent processes that can be made by those skilled in the art without creative effort, or directly or indirectly applied to other related technical fields, are still within the scope of protection of the present utility model.
Claims
1. A quick-connect pipe fitting, comprising a first mating end and a second mating end, characterized in that: A fastening handle is pinned to the outer periphery of the opening near the second docking end of the first docking end. The fastening handle is U-shaped and includes two arms and an arc segment connecting the two arms. The arc segment can fit onto the outer diameter of the tube section of the first docking end as the fastening handle rotates around the pin joint. The free end of each arm is integrally formed with a pin joint. Each of the two pin joints is pinned to one side of the opening of the first docking end. The pin joints extend a distance away from the arms and form a fastening part at the end. The fastening part is a hook-shaped structure formed inside the pin joint, and the end face of the hook-shaped structure facing the arms is flat. A bearing portion is fixedly provided on the outer periphery of the opening near the first docking end of the second docking end. The number of bearing portions corresponds to the number of fastening portions. The end face of each bearing portion away from the first docking end is an arc surface that protrudes along the axial direction of the pipe section. An engagement groove is provided on the arc surface of the bearing portion. The bottom surface of the engagement groove is also an arc surface that protrudes in the middle in the direction away from the first docking end. The width of the engagement groove is the same as the thickness of the fastening portion. When the first docking end and the second docking end are connected together, the fastening portion rotates into the engagement groove and abuts against the middle position of the bottom surface of the engagement groove.
2. The quick-connect pipe coupling according to claim 1, characterized in that: A threaded hole is provided on the outer periphery of the opening near the second docking end of the first docking end. The threaded hole is a short pin shaft with a threaded blind hole in the center, and a pin is installed in the threaded blind hole. A circular hole is provided on the pin joint of the fastening handle so that the short pin shaft can be fitted into it. The outer diameter of the outer end cap of the pin is larger than the inner diameter of the circular hole to prevent the pin joint from disengaging from the short pin shaft.
3. The quick-connect pipe fitting according to claim 1 or 2, characterized in that: The first docking end has an outwardly extending convex ring formed on the open end face, and the inner circumferential side of the second docking end is recessed downward to form a step. The convex ring can extend into the second docking end and abut against the step.
4. The quick-connect pipe fitting according to claim 1 or 2, characterized in that: A stop portion is formed on the end face of the open end of the first docking end near the outer peripheral surface. The stop portion extends outward along the axial direction and has a notch. A limit pin is provided on the outer peripheral side of the open end of the second docking end. When the first docking end is connected to the second docking end, the limit pin enters the notch.
5. The quick-connect pipe coupling according to claim 4, characterized in that: The stop portion is provided with one or more, and the number of the limiting pins is the same as the number of the stop portions.
6. The quick-connect pipe coupling according to claim 3, characterized in that: A sealing ring is provided on the stepped portion; or, a sealing groove is provided on the stepped portion, and the sealing groove contains a sealing ring.
7. The quick-connect pipe coupling according to claim 1, characterized in that: The inner circumferential surface of the opening adjacent to the second docking end of the first docking end is formed into an inner conical surface. A one-way shut-off valve assembly is provided inside the pipe section of the first docking end. The one-way shut-off valve assembly includes a mounting base, a check valve core, and a spring. The mounting base has multiple flow holes and is fixedly installed inside the pipe section of the first docking end. The check valve core is slidably installed on the mounting base, and a spring is provided between the mounting base and the check valve core. The spring pushes the check valve core so that the outer conical surface of the check valve core fits against the inner conical surface at the opening. The inner circumferential surface of the opening of the second docking end adjacent to the first docking end is also formed into an inner conical surface. The same one-way shut-off valve assembly is also installed inside the tube body of the second docking end. When the first docking end and the second docking end are connected together, the two check valve cores push against each other to compress the spring, so that the channel between the check valve core inside the first docking end and the inner conical surface at the opening of the first docking end is opened, and the channel between the check valve core inside the second docking end and the inner conical surface at the opening of the second docking end is also opened.