Quick joint for pipe

Abstract

A quick joint for a pipe (1), said joint comprising an interface (100), a clamp (210), and a limiting assembly (300). The interface (100) is provided with a lining pipe (110) for a pipe to be inserted into, the lining pipe (110) is provided with a flow channel (111) that is in communication with the pipe (1), and an insertion slot (120) for the pipe (1) to be inserted into is formed between the lining pipe (110) and the interface (100). The clamp (210) connects the limiting assembly (300) onto the interface (100). The limiting assembly (300) is located on the outside of the lining pipe (110), and the limiting assembly (300) cooperates with the lining pipe (110) to limit the pipe (1). The pipe (1) to be connected is inserted directly from the limiting assembly (300) into the insertion slot (120), such that an inner wall of said pipe (1) fits to an outer wall of the lining pipe (110), and the inner wall of said pipe (1) is supported by the lining pipe (110). Even when being pressed by the limiting assembly (300), the inner diameter of said pipe (1) is not reduced at the lining pipe (110). Regardless of whether the pipe (1) is in a high-temperature or low-temperature environment, the limiting assembly (300) can ensure the quality of limiting the pipe (1), thus effectively improving the connection between the present quick joint and the pipe (1).

Description

A quick coupling for pipes Technical Field

[0001] This utility model belongs to the technical field of pipe connectors, and specifically relates to a quick connector for pipes. Background Technology

[0002] In daily production and life, many fluids need to be transported through pipelines. However, the length of pipelines is limited, so pipe joints are needed to connect two or more sections of pipeline to increase the overall length of the pipeline. Pipe joints are also needed to connect pipelines to water-using equipment.

[0003] Chinese Patent Publication No. CN201836571U discloses a quick-connect pipe fitting, comprising a fitting body. Inside the fitting body, along the pipe insertion direction, are arranged sequentially as follows: a locking cap to prevent internal components from retracting; a locking cap stop component located on the pipe insertion end of the fitting body to prevent the locking cap from retracting; a release ring to release the pipe from its locking position; a retaining ring with an annular elastic flange and several retaining teeth for clamping the outer wall of the pipe; a cone seat slidably connected to the inner wall of the fitting body to prevent the retaining ring from moving in the pipe insertion direction; a cone seat shoulder located on the inner wall of the fitting body to prevent the cone seat from moving in the pipe insertion direction; an O-ring seal to form a sealing connection with the outer wall of the pipe after the pipe is inserted into the fitting; an O-ring seal shoulder located on the inner wall of the fitting body to prevent the O-ring seal from moving in the pipe insertion direction; and a stop component located on the inner wall of the fitting body to prevent the pipe from moving in the insertion direction.

[0004] The above technical solution has the following drawbacks: When the quick connector is used as a hose connector, the hose end is inserted into the connector body, and the retaining teeth on the retaining ring press against the outer wall of the hose. When liquid is introduced into the hose and it expands, the retaining teeth will further press against the outer wall of the hose and lock the hose in place, preventing the hose from falling out of the connector. In the high temperatures of summer in low latitudes, the hose will soften due to heat. If the pressure inside the hose decreases at this time, or if there is no water flow, the retaining teeth will still squeeze the hose, causing the hose to deform inward. This results in a reduction in the inner diameter of the hose at the retaining teeth, ultimately reducing the flow rate of the medium inside the hose. Moreover, after the hose softens due to heat inside the connector, the retaining effect of the retaining teeth on the hose is reduced. The hose is not only easy to loosen, but can even be pulled directly out of the connector, resulting in a poor connection effect. In addition, to ensure the service life of the connector body, the entire connector body is made of copper-based metals, which not only makes the material itself more expensive, but also requires multiple processing steps before assembly with other components, resulting in high production costs and limited profits, which is detrimental to market competitiveness. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a quick connector for pipelines. The technical problem to be solved by this utility model is: how to improve the connection effect between the connector and the pipeline.

[0006] The above-mentioned technical objectives of this utility model can be achieved through the following technical solutions:

[0007] A quick connector for pipes includes an interface, a clamp, and a limiting component. The interface has a liner for pipe insertion, and the liner has a flow channel communicating with the pipe. A insertion groove for pipe insertion is provided between the liner and the interface. The clamp connects the limiting component to the interface. The limiting component is located outside the liner and cooperates with the liner to limit the pipe.

[0008] In the aforementioned quick connectors, the material of the interface includes plastic or metal.

[0009] In the above-mentioned quick connector, the liner is integrally formed with the interface, and the outer end of the liner has a guide surface.

[0010] In the above-mentioned quick connector, the end of the interface away from the liner has a connecting end, and a sheath is provided on the outside of the connecting end.

[0011] In the aforementioned quick connector, the sheath is made of hard metal.

[0012] In the aforementioned quick connector, the outer end of the flow channel has a guide surface that communicates with the pipe.

[0013] In the aforementioned quick connector, the clamp is fitted onto the end of the interface, and the two ends of the clamp have a rolled edge one and a rolled edge two, respectively. The rolled edge one fits into the protrusion outside the interface, and the rolled edge two fits into the outer wall of the limiting component.

[0014] In the aforementioned quick connector, the limiting component includes a base, a pressure cap, and a retaining ring. The clamp connects the base to the interface. The base has a communicating limiting groove and an assembly hole. The pressure cap and the retaining ring are both disposed in the limiting groove, and the pressure cap cooperates with the limiting groove to limit the retaining ring. The retaining ring has several retaining teeth spaced circumferentially inside. The retaining teeth are all bent towards the interface and close to the outer wall of the liner. Each retaining tooth has a sharp edge at its end. The pressure cap has a relief surface at the end near the retaining tooth.

[0015] In the above-mentioned quick connector, the outer wall of the pressure cap is provided with a flange, and the limiting groove is provided with a positioning groove for mounting the flange, and the positioning groove limits the flange.

[0016] In the aforementioned quick coupling, the interface is provided with an installation groove, and a sealing ring is provided in the installation groove. The pressure cap cooperates with the installation groove to limit the sealing ring, and the inner ring of the sealing ring can be pressed against the outer wall of the pipe.

[0017] In summary, the beneficial effects of this utility model compared to the prior art are as follows:

[0018] The pipe to be connected is directly inserted into the insertion slot through the limiting component, ensuring that the inner wall of the pipe is in contact with the outer wall of the liner. The liner supports the inner wall of the pipe, preventing the inner diameter of the pipe from shrinking at the liner even when squeezed by the limiting component. The limiting component maintains the pipe's positioning quality in both high and low temperature environments, effectively improving the connection between the quick connector and the pipe. Furthermore, the interface is made entirely of plastic, and the limiting component and interface are connected as a single unit using clamps, reducing the production cost of this quick connector. The outer sheath of the connection end enhances the structural strength and wear resistance of the connection end, ensuring the service life of this quick connector. Attached Figure Description

[0019] Figure 1 is a cross-sectional view of the interface;

[0020] Figure 2 is one of the schematic diagrams of the external structure of the embodiment;

[0021] Figure 3 is a cross-sectional view of Figure 2;

[0022] Figure 4 is a cross-sectional schematic diagram of the limiting component;

[0023] Figure 5 is a cross-sectional view of the retaining ring;

[0024] Figure 6 is a cross-sectional view of Figure 2 after the explosion;

[0025] Figure 7 is a schematic diagram of the embodiment after connection with the pipeline;

[0026] Figure 8 shows the second schematic diagram of the external structure of the embodiment;

[0027] Figure 9 is a cross-sectional view of Figure 8.

[0028] Attached reference numerals: 1. Pipe;

[0029] 100. Interface; 110. Liner; 111. Flow channel; 112. Guide surface; 113. Flow guide surface; 120. Insert groove; 130. Connection end; 131. Sheath; 140. Protrusion; 150. Mounting groove; 151. Sealing ring;

[0030] 200. Clamp; 210. Hemmed edge one; 220. Hemmed edge two;

[0031] 300, Limiting component; 310, Base; 311, Limiting groove; 3111, Positioning groove; 312, Assembly hole; 3121, Stepped surface; 320, Pressure cap; 321, Leaving surface; 322, Flange; 330, Snap ring; 331, Snap tooth; 332, Pointed blade; 340, Unlocking tube; 341, Center hole; 342, Plug; 3421, Bevel. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

[0033] A quick connector for pipes, as shown in Figures 1-9, includes an interface 100, a clamp 200, and a limiting component 300. The interface 100 has a liner 110 for pipe 1 to be inserted into. The liner 110 has a flow channel 111 that connects to the pipe 1. The outer end of the liner 110 is located inside the limiting component 300. There is a insertion groove 120 between the liner 110 and the interface 100 for the end of the pipe 1 to be inserted. The clamp 200 connects the limiting component 300 to the end of the interface 100. After the pipe 1 passes through the limiting component 300 and is inserted into the outer wall of the liner 110, the limiting component 300 and the liner 110 cooperate to limit the pipe 1.

[0034] The material of the interface 100 includes PPSU plastic or low-cost metal; in some embodiments, the liner 110 and the interface 100 are connected by snap-fit, threaded connection or integral molding, and the liner 110 and the interface 100 are made of the same material.

[0035] The outer end of the liner 110 has a guide surface 112 that facilitates the insertion of the end of the pipe 1 to be connected, and the outer end of the flow channel 111 has a flow guide surface 113 that communicates with the pipe 1 to be connected.

[0036] As shown in Figures 1 and 3, the end of the interface 100 furthest from the liner 110 has a connecting end 130. The connecting end 130 communicates internally with the flow channel 111 and is used to connect a suitable connector or water appliance. The connecting end 130 is covered by a sheath 131, and the outer wall shape of the connecting end 130 is the same as the outer wall shape of the sheath 131; for example, if the outer wall of the connecting end 130 is hexagonal, then the outer shape of the sheath 131 is also hexagonal. As shown in Figures 8 and 9, in some embodiments, the sheath 131 only covers the end of the connecting end 130 and does not need to completely cover the outer wall of the connecting end 130.

[0037] Furthermore, the sheath 131 is made of hard metal, preferably stainless steel, high-strength aluminum alloy or other alloy materials. The sheath 131 is used to strengthen the structural strength and wear resistance of the connecting end 130, thereby increasing its service life.

[0038] The clamp 200 is fitted onto the end of the interface 100. The two ends of the clamp 200 have a first rolled edge 210 and a second rolled edge 220, respectively. The first rolled edge 210 fits against the protrusion 140 outside the interface 100, and the second rolled edge 220 fits against the outer wall of the limiting component 300.

[0039] As shown in Figures 3-6, the limiting component 300 includes a base 310, a pressure cap 320, a retaining ring 330, and an unlocking tube 340. A clamp 200 wraps around the base 310 and connects to the interface 100, with a rolled edge 220 fitting snugly to the end of the base 310. The base 310 has a communicating limiting groove 311 and an assembly hole 312. The retaining ring 330 is located at the bottom of the limiting groove 311. The pressure cap 320 is located at the opening of the limiting groove 311 and close to the interface 100, and the pressure cap 320 cooperates with the limiting groove 311 to limit the retaining ring 330. The retaining ring 330 has several circumferentially spaced retaining teeth 331, each with elastic deformation properties. Each retaining tooth 331 bends towards the interface 100 and approaches the outer edge of the liner 110. To ensure that the locking teeth 331 can be smoothly embedded into the outer wall of the pipe 1, each locking tooth 331 has a sharp edge 332 at its end, and the sharp edge 332 can guide the pipe 1 inserted into the locking ring 330. The end of the pressure cap 320 near the locking teeth 331 has a relief surface 321 for each locking tooth 331 to deform. The unlocking tube 340 is slidably disposed in the assembly hole 312. The unlocking tube 340 has a central hole 341 for the pipe 1 to be inserted. The assembly hole 312 has a stepped surface 3121. The stepped surface 3121 limits the plug 342 at the inner end of the unlocking tube 340, so that the plug 342 can slide between the stepped surface 3121 and the locking teeth 331. The outer wall of the plug 342 has an inclined surface 3421 that can squeeze the locking teeth 331 to deform towards the relief surface 321.

[0040] As shown in Figure 4, preferably, the outer wall of the pressure cap 320 is provided with a flange 322, and the positioning groove 311 is provided with a positioning groove 3111 for mounting the flange 322. The positioning groove 3111 limits the flange 322, thereby ensuring the position of the retaining ring 330 in the positioning groove 311. At the same time, it also allows the limiting component 300 to form an integral part for assembly.

[0041] An installation groove 150 is provided at the end of the interface 100 near the base 310. A sealing ring 151 is provided in the installation groove 150. The pressure cap 320 cooperates with the installation groove 150 to limit the sealing ring 151. The inner ring of the sealing ring 151 can be pressed against the outer wall of the pipe 1, thereby improving the airtightness between the pipe 1 and the insertion groove 120.

[0042] The working principle of this utility model is as follows:

[0043] The pipe 1 to be connected is a flexible hose. The end of pipe 1 is inserted into the central hole 341, and then guided by the guide surface 112 and the tip 332, making it easier for the end of pipe 1 to be inserted into the liner 110. After the end of pipe 1 enters the insertion groove 120, pipe 1 is connected to the flow channel 111, and the retaining teeth 331 press pipe 1 tightly against the liner 110. The inner wall of the sealing ring 151 abuts against the outer wall of pipe 1, and the connection between this quick connector and the pipe 1 to be connected is completed. If pipe 1 is dislodged from the insertion groove 120 due to force, the retaining teeth 331 will be driven by pipe 1 and deform towards the plug 342, so that the retaining teeth 331 further engage with the outer wall of pipe 1 and press pipe 1 further against the outer wall of liner 110, preventing pipe 1 from separating from the interface 100.

[0044] When disassembling the pipe 1 from this quick connector, simply press the unlocking tube 340 so that the plug 342 squeezes each locking tooth 331 toward the relief surface 321. The pipe 1 can be pulled out of the insertion slot 120 after losing the restriction of the locking teeth 331.

[0045] After the connection end 130 is connected to the water appliance, the pipe 1 can transport the medium to the water appliance; after the connection end 130 is connected to other connectors, the pipe 1 can transport the medium to that connector. During the transport of the medium in the pipe 1, the guide surface 113 can guide the medium into the flow channel 111, thereby avoiding the medium being blocked at the liner 110.

[0046] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A quick coupling for pipes, characterized by: The utility model provides an interface (100), the clamp (200), limiting assembly (300), the interface (100) in be provided with the bushing (110) of pipe (1) insertion, the bushing (110) has the flow channel (111) of intercommunication pipe (1), the bushing (110) with interface (100) between set up the insertion slot (120) of pipe (1) insertion, the clamp (200) will limiting assembly (300) be connected on interface (100), limiting assembly (300) is located the bushing (110) outside, and limiting assembly (300) with bushing (110) cooperation is positioned to pipe (1).

2. The quick coupling of claim 1, wherein: The material of the interface (100) includes plastic or metal.

3. The quick coupling of claim 2, wherein: The bushing (110) is integrally formed with the interface (100), and the bushing (110) has a guide surface (112) at an outer end.

4. The quick coupling of claim 1, wherein: The interface (100) has a connecting end (130) at an end away from the bushing (110), and the connecting end (130) is provided with a sheath (131) outside.

5. The quick coupling of claim 4, wherein: The material of the sheath (131) is hard metal.

6. The quick coupling of claim 1, wherein: The flow channel (111) has a guide surface (113) at an outer end for communication with the pipe (1).

7. The quick coupling of claim 1, wherein: The clamp (200) is sleeved on an end of the interface (100), and the clamp (200) has a first curled edge (210) and a second curled edge (220) at two ends respectively, the first curled edge (210) is attached to a protrusion (140) outside the interface (100), and the second curled edge (220) is attached to an outer wall of the limiting assembly (300).

8. Quick coupling according to any one of claims 1-7, characterized in that: The limiting assembly (300) includes a base (310), a pressing cap (320) and a clasp (330), the clamp (200) connects the base (310) and the interface (100), the base (310) has a limiting slot (311) and an assembly hole (312) in communication, the pressing cap (320) and the clasp (330) are arranged in the limiting slot (311), the pressing cap (320) is positioned to the clasp (330) in cooperation with the limiting slot (311), a plurality of clamping teeth (331) are circumferentially and spaced apart in the clasp (330), the clamping teeth (331) are all bent towards the interface (100) and close to an outer wall of the bushing (110), and a sharp edge (332) is arranged at an end of each clamping tooth (331), and a giving space surface (321) is arranged at an end of the pressing cap (320) close to the clamping teeth (331).

9. The quick coupling of claim 8, wherein: An outer wall of the pressing cap (320) is provided with a flange (322), and the limiting slot (311) is provided with a positioning slot (3111) for mounting the flange (322), and the positioning slot (3111) is positioned to the flange (322).

10. The quick coupling of claim 8, wherein: The interface (100) is provided with a mounting groove (150), a sealing ring (151) is arranged in the mounting groove (150), the pressing cap (320) cooperates with the mounting groove (150) to limit the sealing ring (151), and the inner ring of the sealing ring (151) can abut against the outer wall of the pipeline (1).

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