A quick-connect pipe fitting

Abstract

This invention discloses a quick-connect pipe fitting, relating to the field of pipe fitting technology. It includes a connector, a fitting, and a pipe head. The right end of the connector is welded with a welding ring, the inner right end of which engages with the outer left end. The welding ring is used for positioning and welding the fitting, fixing the fitting to the connector. The fitting connects the connector to a curved pipe port on the right side. The outer right end of the pipe head engages with the inner left end of the connector, and the pipe head is used for positioning and engaging the left pipe port with the connector. This invention achieves coordinated guiding, positioning, and rapid fastening of the left pipe and connector through the sliding guidance of the pipe head's insertion plate and the connector's insertion slot, while simultaneously securing it within the connector's clamping slot using a metal clamp. The insertion structure ensures no misalignment during connection, and the clamp and clamping slot limit the clamping force for even distribution, improving installation efficiency compared to traditional non-guided fastening structures.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings, and in particular to a quick-connect pipe fitting. Background Technology

[0002] In the field of pipeline connection technology, pipeline joints are the core components for connecting different pipelines. Their ease of installation and sealing reliability are key design considerations. In existing technologies, to simplify the installation process and reduce the risk of leakage at pipeline connections, pipeline joints often adopt an integrated design of connector and fitting, that is, the connector and fitting are an inseparable whole structure. This integrated structure shows certain advantages in straight pipe connection scenarios. During installation, there is no need to adjust the relative position of the connector and fitting. They can be directly connected to the pipeline port, and a preliminary seal can be achieved through a single sealing structure, which reduces the assembly complexity to a certain extent.

[0003] However, for connecting curved pipes, existing integrated structures suffer from limitations in directional adjustment. Since the connector and joint are fixed as one unit, the joint orientation cannot be flexibly adjusted according to the direction of the pipeline layout, making precise alignment difficult in complex pipeline layouts. This may even require additional pipe cutting to adapt to the joint orientation, increasing installation costs and time. Furthermore, the sealing reliability is insufficient. Integrated structures often rely on a single sealing method, which is prone to failure due to stress concentration under conditions such as vibration and temperature changes, resulting in a high risk of leakage. Finally, welding stability is poor. If welding is required to reinforce the connection between the joint and the pipeline, the lack of pre-positioning design in the integrated structure makes it prone to misalignment during welding, leading to unstable welding quality and further affecting connection strength and sealing. Therefore, a quick-connect pipe fitting is needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quick-connect pipe fitting to solve the problem of fixed orientation of integrated fittings in the aforementioned technical solutions.

[0005] The device includes a connector, a joint, and a pipe head, wherein the joint is located on the right side of the connector, the pipe head is located on the left side of the connector, the right end of the joint is connected to a right-side curved pipe port, and the left end of the pipe head is located at the right end of the left-side pipe port. A welding ring is welded to the right end of the connector. The inner right end of the welding ring is engaged with the outer left end of the welding ring. The welding ring is used for positioning, engaging and welding the connector to fix the connector to the connector. The connector is used to connect the connector and the curved pipe port on the right side. The outer right end of the pipe head engages with the inner left end of the connector, and the pipe head is used for positioning and engaging the left pipe port with the connector; The connector is provided with a metal clamp on the outside, which is used for the detachable fixing of the pipe head and the connector.

[0006] Furthermore, the connector has insertion slots on both the upper and lower left sides, and the pipe head has insertion plates on both the upper and lower outer sides, with the insertion plates slidably connected to the inner sides of the corresponding insertion slots.

[0007] Furthermore, the connector has clamp grooves at the center of both the front and rear sides, and the front and rear parts of the metal clamps are respectively located in the corresponding clamp grooves.

[0008] Furthermore, the metal clamp has 90° bends at both the front and rear ends of its upper part, the bends are arranged in opposite directions, and the metal clamp has a U-shaped structure.

[0009] Furthermore, a positioning groove is provided on the inner side of the welding ring, and a locking tooth is provided on the positioning groove. A positioning insert ring is provided on the left end of the connector, and a plurality of positioning pins are provided at equal intervals on the left end of the positioning insert ring. The positioning insert ring is slidably connected to the inner side of the positioning groove, and the locking tooth abuts against the outer side of the positioning insert ring. All the positioning pins abut against the inner wall of the positioning groove.

[0010] Furthermore, the outer right end of the connector is provided with an external thread, and the outer middle part of the connector is provided with a first structural reinforcement protrusion.

[0011] Furthermore, a connector is provided at the right end of the pipe head, and a second structural reinforcement protrusion is provided at the middle of the outer side of the pipe head.

[0012] Furthermore, a sealing rubber ring is provided at the mating position of the welding ring and the joint.

[0013] The beneficial effects of this utility model are as follows: 1. By sliding the plug plate of the pipe head and the plug groove of the connector for guidance, and simultaneously fastening it in the clamp groove of the connector with metal clamps, the left-side pipe and connector are guided, positioned and fastened quickly. The plug structure ensures no misalignment during connection, and the clamp and clamp groove limit the clamping force evenly. Compared with traditional non-guided fastening structures, this improves installation efficiency and reduces the connection loosening rate, balancing rapid installation and long-term stability. Through the linkage between the positioning groove of the welding ring, the locking teeth and the positioning ring and positioning post of the connector, and the pre-sealing with the sealing rubber ring, the right-side curved pipe and connector angle adjustment, precise positioning and pre-sealing are achieved. The sliding fit between the positioning groove and the positioning ring supports 360° directional adjustment, the locking teeth and positioning post lock the angle, and the sealing rubber ring forms a preliminary seal before welding, solving the pain point of fixed direction of integrated connectors, improving the welding qualification rate, and improving the sealing reliability compared with a single welding structure.

[0014] 2. By using the U-shaped structure of the metal clamp and the 90° elbow to cooperate with the clamp groove of the connector, the welding ring is linked to the welding and fixing of the connector 3, realizing the coordinated design of the left-side live connection and the right-side fixed connection. The reverse elbow of the left clamp enhances the pre-tightening force through the lever principle, supporting quick disassembly and assembly. At the same time, the right-side welding and positioning structure achieve permanent fixation. The linkage of the two allows the connector to adapt to the flexible maintenance of the left-side pipeline while ensuring the long-term connection stability of the right-side curved pipeline, expanding the applicable scenarios to complex pipeline layouts. Through the first structural reinforcement protrusion of the connector and the second structural reinforcement protrusion of the pipe head, they are linked to their respective connection parts with the connector. The reinforcement protrusion enhances the connection resistance to deformation between the connector and the curved pipeline, and between the pipe head and the left-side pipeline. Linked with the overall connection structure of the connector, the connector does not undergo plastic deformation under high impact pressure, and the connection does not loosen under large temperature difference environments. Its pressure resistance and environmental deformation resistance are better than those without reinforcement structures. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection structure of a quick-connect pipe fitting.

[0016] Figure 2 This is a cross-sectional view of the connection structure of a quick-connect pipe fitting.

[0017] Figure 3 This is a three-dimensional structural diagram of a quick-connect pipe fitting.

[0018] Figure 4 This is a three-dimensional sectional view of a quick-connect pipe fitting connector.

[0019] Figure 5 This is a cross-sectional view of a quick-connect pipe fitting connector.

[0020] Figure 6 This is a three-dimensional structural diagram of a metal clamp for a quick-connect pipe fitting.

[0021] Figure 7 This is a three-dimensional structural diagram of a quick-connect pipe fitting.

[0022] Figure 8 This is a cross-sectional view of the pipe head of a quick-connect pipe fitting.

[0023] Figure 9 This is a three-dimensional structural diagram of a quick-connect pipe fitting.

[0024] Figure 10 This is a cross-sectional view of a quick-connect pipe fitting.

[0025] Explanation of reference numerals in the attached figures: 1. Connector; 101. Insertion groove; 102. Clamp groove; 2. Welding ring; 201. Positioning groove; 202. Clamping teeth; 3. Connector; 301. External thread; 302. First structural reinforcing protrusion; 303. Positioning ring; 304. Positioning post; 4. Pipe head; 401. Insertion connector; 402. Insertion plate; 403. Second structural reinforcing protrusion; 5. Metal clamp; 501. Elbow; 6. Sealing rubber ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0027] Please see Figures 1-10 This utility model provides a technical solution: a quick-connect pipe fitting, including a connector 1, a connector 3 and a pipe head 4. The connector 3 is located on the right side of the connector 1, and the pipe head 4 is located on the left side of the connector 1. The right end of the connector 3 is connected to the right side of the curved pipe port, and the left end of the pipe head 4 is located at the right end of the left side of the pipe port. A welding ring 2 is welded to the right end of connector 1. The inner right end of welding ring 2 is engaged with the outer left end of welding ring 2. Welding ring 2 is used for positioning and welding of connector 3, so that connector 3 is fixed to connector 1. Connector 3 is used to connect connector 1 and the curved pipe port on the right side. The outer right end of the pipe head 4 is engaged with the inner left end of the connector 1. The pipe head 4 is used for positioning and engaging the left pipe port with the connector 1. A metal clamp 5 is provided on the outside of connector 1. The metal clamp 5 is used for the detachable fixation of pipe head 4 and connector 1.

[0028] Please see Figures 1-3 The connector 1 has insertion slots 101 on the upper and lower left sides, and the pipe head 4 has insertion plates 402 on the upper and lower sides. The insertion plates 402 are slidably connected to the inner side of the corresponding insertion slots 101. The sliding fit between the insertion slots 101 and the insertion plates 402 forms a guide structure, which can quickly align the axes of the connector 1 and the pipe head 4 during installation, avoiding sealing failure caused by misalignment. Compared with the design without a guide, the assembly time is shortened, and the coaxiality error is controlled, providing a stable foundation for the fastening of the metal clamp 5.

[0029] Please see Figure 1 and Figure 3The connector 1 has clamp grooves 102 in the middle of both the front and rear sides. The metal clamp 5 is located in the corresponding clamp grooves 102. The clamp grooves 102 form a circumferential limit on the metal clamp 5 to prevent it from sliding axially when the pipeline vibrates. This allows the clamping force of the metal clamp 5 to be evenly applied to the joint between the connector 1 and the pipeline head 4, reducing the loosening rate compared to the grooveless design.

[0030] Please see Figure 1 and Figure 6 The metal clamp 5 has 90° elbows 501 at both the front and rear ends of the upper part. The elbows 501 are set in the opposite direction. The metal clamp 5 has a U-shaped structure. The U-shaped structure is adapted to the outer circumference of the connector 1, and can fit the entire circumference to achieve uniform clamping. The reverse 90° elbows 501 enhance the pre-tightening force through leverage, and can be tightened by hand.

[0031] Please see Figures 3-9 The inner side of the welding ring 2 is provided with a positioning groove 201, and the positioning groove 201 is provided with a retaining tooth 202. The left end of the connector 3 is provided with a positioning insert ring 303, and several positioning pins 304 are equidistantly arranged on the left end of the positioning insert ring 303. The positioning insert ring 303 is slidably connected to the inner side of the positioning groove 201, and the retaining tooth 202 abuts against the outer side of the positioning insert ring 303. The positioning pins 304 all abut against the inner wall of the positioning groove 201. The positioning groove 201 and the positioning insert ring 303 cooperate to realize the circumferential angle adjustment of the connector 3 and the welding ring 2. The abutment of the retaining tooth 202 and the positioning pin 304 can lock any adjustable angle, solving the problem of fixed direction of the integrated connector. There is no relative sliding before welding, which improves the welding qualification rate.

[0032] Please see Figures 9-10 The outer right end of the connector 3 is provided with an external thread 301, and the middle of the outer side of the connector 3 is provided with a first structural reinforcement protrusion 302. The external thread 301 can be adapted to the curved pipe port of different specifications, improving versatility. At the same time, the first structural reinforcement protrusion 302 enhances the bending strength of the connector 3, and there is no plastic deformation under working pressure, thus extending the service life.

[0033] Please see Figures 7-8 The right end of the pipe head 4 is provided with a plug 401, and the middle of the outer side of the pipe head 4 is provided with a second structural reinforcement protrusion 403. The plug 401 can be quickly inserted into the connector 1 to realize the pre-connection between the left pipe and the connector 1, thereby improving the installation efficiency. At the same time, the second structural reinforcement protrusion 403 enhances the connection strength between the pipe head 4 and the left pipe, ensuring that it does not loosen when the temperature changes, and adapts to complex environments.

[0034] Please see Figure 2A sealing rubber ring 6 is provided at the mating position of the welding ring 2 and the joint 3. The sealing rubber ring 6 achieves a preliminary seal by compression before welding. After welding, it forms a double sealing structure with the weld, which reduces the liquid leakage rate and improves the vibration leakage resistance compared with a single welding seal.

[0035] Working principle: First, after welding the left pipe port to the left end of the pipe head 4, insert the plug 401 on the right end of the pipe head 4 into the inner left end of the connector 1. At this time, the plug plate 402 on the outside of the pipe head 4 slides into the plug groove 101 inside the connector 1, achieving precise positioning through the concave-convex structure to avoid misalignment during installation. After positioning, fasten the U-shaped metal clamp 5 into the clamp groove 102 on the outside of the connector 1. The reverse 90° bend 501 on the upper part of the metal clamp 5 is tightened by the elastic pre-tightening force, detachably fixing the pipe head 4 and the connector 1. Then, after connecting the right bent pipe port to the right end of the connector 3 through the external thread 301, adjust the relative angle between the connector 3 and the connector 1 according to the pipe layout direction requirements. Insert the positioning ring 303 on the left end of the connector 3 into the positioning groove 201 of the welding ring 2 on the right end of the connector 1. The outer side of the positioning ring 303 abuts against the teeth 202 in the positioning groove 201. Simultaneously, the positioning post 304 fits against the inner wall of the positioning groove 201, achieving precise positioning of the circumferential angle. After the angle is determined, the welding ring 2 and the joint 3 are welded and fixed. The sealing rubber ring 6 between the welding ring 2 and the joint 3 is squeezed and deformed to fill the gap and achieve preliminary sealing. After welding, the connection sealing and structural strength are further enhanced. Finally, the first structural reinforcement protrusion 302 on the outside of the joint 3 and the second structural reinforcement protrusion 403 on the outside of the pipe head 4 enhance their own deformation resistance to avoid damage to components caused by excessive internal pressure in the pipe. The pre-tightening force of the metal clamp 5 on the left and the welding and fixing on the right form a synergistic structure of left-hand movable and right-hand fixed, which not only meets the convenient disassembly and assembly requirements of the left pipe, but also ensures the long-term stability of the right curved pipe connection. At the same time, the dual protection of the sealing rubber ring 6 and the welding seal, as well as the positioning and guiding role of the plug-in structure, jointly ensure the leak-free operation of the entire joint in complex pipeline layout scenarios.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A pipe quick coupling comprising a connector (1), a coupling (3) and a pipe head (4), characterized in that: The connector (3) is located on the right side of the connector (1), and the pipe head (4) is located on the left side of the connector (1). The right end of the connector (3) is connected to the right side of the curved pipe port, and the left end of the pipe head (4) is located at the right end of the left side of the pipe port. A welding ring (2) is welded to the right end of the connector (1). The inner right end of the welding ring (2) is engaged with the outer left end of the welding ring (2). The welding ring (2) is used for positioning and welding of the connector (3) to fix the connector (3) to the connector (1). The connector (3) is used to connect the connector (1) and the right side of the curved pipe port. The outer right end of the pipe head (4) is engaged with the inner left end of the connector (1). The pipe head (4) is used for positioning and engaging the left side of the pipe port with the connector (1). A metal clamp (5) is provided on the outside of the connector (1). The metal clamp (5) is used for detachable fixing of the pipe head (4) and the connector (1).

2. A quick-plug pipe coupling according to claim 1, wherein: The connector (1) has a plug groove (101) on the upper and lower left sides inside, and the pipe head (4) has a plug plate (402) on the upper and lower sides outside. The plug plate (402) is slidably connected to the inner side of the corresponding plug groove (101). The connector (1) has a clamp groove (102) in the middle of the front and rear sides, and the metal clamp (5) is located in the corresponding clamp groove (102) in the front and rear sides.

3. A quick connect fitting for pipe according to claim 1, wherein: The metal clamp (5) has 90° elbows (501) at both the front and rear ends of the upper part. The elbows (501) are arranged in opposite directions, and the metal clamp (5) has a U-shaped structure.

4. A quick connect coupling according to claim 1, wherein: The inner side of the welding ring (2) is provided with a positioning groove (201), and the positioning groove (201) is provided with a locking tooth (202). The left end of the connector (3) is provided with a positioning insert ring (303), and a plurality of positioning pins (304) are provided at equal intervals on the left end of the positioning insert ring (303). The positioning insert ring (303) is slidably connected to the inner side of the positioning groove (201), and the locking tooth (202) abuts against the outer side of the positioning insert ring (303). The positioning pins (304) all abut against the inner wall of the positioning groove (201).

5. A quick connect coupling according to claim 1, wherein: The outer right end of the connector (3) is provided with an external thread (301), and the middle part of the outer side of the connector (3) is provided with a first structural reinforcement protrusion (302).

6. A quick connect coupling according to claim 1, wherein: The right end of the pipe head (4) is provided with a connector (401), and the middle of the outer side of the pipe head (4) is provided with a second structural reinforcement protrusion (403).

7. A quick-connect pipe coupling in accordance with claim 1, wherein: A sealing rubber ring (6) is provided at the mating position of the welding ring (2) and the joint (3).

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