A lead-free angle valve

Abstract

This utility model relates to the field of valve technology, specifically to a lead-free angle valve, comprising a plastic water pipe and a metal shell covering the outer wall of the water pipe. A plastic valve core is detachably installed on the top of the water pipe. The valve core includes a plastic connecting pipe with an outlet on one side and a plastic inlet base fastened to the bottom of the connecting pipe. The inner wall of the top of the connecting pipe is also detachably and movably fitted with an opening and closing element whose bottom end is detachably fastened to the inlet base. A water outlet pipe is fixedly provided on one side of the metal shell. A plastic water outlet structure is detachably installed inside the water outlet pipe, and the end of the water outlet structure is sealed and fitted to the side wall of the connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a lead-free angle valve. Background Technology

[0002] Angle valves, also known as triangular valves or angle stop valves, are a very common and important type of small valve in household water systems. They typically consist of a valve body shaped at a 90-degree angle and three ports on the valve body: one port for inlet, another for outlet, and a third for installing the valve core. The main purpose of angle valves is to convert vertical (or horizontal) water pipes inside walls or floors into horizontal (or vertical) pipes, so as to connect to the water inlet hoses of appliances such as faucets, toilet tanks, water heaters, washing machines, and dishwashers. By rotating the valve core, the water supply to individual water-using appliances can be easily opened or closed.

[0003] Although the existing technologies mentioned above can solve the corresponding technical problems, they still have certain drawbacks: after the existing angle valve is connected to the water flow, the water flow through the valve body comes into direct contact with the valve body, and the valve body is made of metal casting, which is prone to corrosion after long-term use. Therefore, after the water flows through, it is easy for a small amount of heavy metals such as copper, lead, and iron contained in the valve body to dissolve into the flowing water, which can easily lead to water pollution. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a lead-free angle valve that is low-pollution, has a large flow rate, and is easy to install.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lead-free angle valve, comprising a plastic water pipe and a metal shell covering the outer wall of the water pipe, wherein a plastic valve core is detachably installed on the top of the water pipe, the valve core comprising a plastic connecting pipe body with a water outlet on one side and a plastic inlet base fastened to the bottom of the connecting pipe body, wherein an opening and closing component whose bottom end is detachably fastened to the inlet base is detachably and movably engaged on the inner wall of the top of the connecting pipe body, and a water outlet pipe is fixedly provided on one side of the metal shell, wherein a plastic water outlet structure is detachably installed inside the water outlet pipe, and the end of the water outlet structure is sealed and fitted to the side wall of the connecting pipe body.

[0006] A further improvement is that the water inlet base includes a water inlet pipe that is sealed and fitted to the top of the water pipe and a water inlet integrally formed on the top surface of the water inlet pipe. The water inlet pipe is fastened to the bottom of the connecting pipe body. A rotating block that can close the water inlet is movably engaged at the top of the water inlet pipe. The top surface of the rotating block is provided with a fastening groove that can be detachably fastened to the bottom of the opening and closing component.

[0007] A further improvement is that the outer wall of the water inlet pipe is integrally formed with a locking block, and the inner wall of the bottom of the connecting pipe is integrally formed with a locking groove. The water inlet pipe is engaged with the bottom of the connecting pipe by locking the locking block into the locking groove.

[0008] A further improvement is that a connecting block for connecting to the top of the water pipe is fitted on the top of the connecting pipe.

[0009] A further improvement is that the water outlet pipe is positioned on the metal casing at the corresponding location of the water outlet, and the end of the water outlet structure is aligned with the water outlet.

[0010] A further improvement is that the opening and closing component includes a rotating rod that can be detachably and movablely engaged with the inner wall of the top of the connecting pipe, and a fastening block disposed at the bottom of the rotating rod, wherein the fastening block is detachably fastened to the fastening groove.

[0011] A further improvement is that a silicone gasket is provided on the bottom surface of the water inlet pipe.

[0012] A further improvement is that the bottom outer wall of the metal shell is integrally formed with connecting threads, and an elastic ring is also fitted on the bottom outer wall of the metal shell at the middle section of the connecting threads.

[0013] A further improvement is that the elastic ring has a frustum-shaped structure, with the end of the elastic ring with a smaller outer diameter facing downwards.

[0014] A further improvement is that the water outlet structure includes a plastic water outlet pipe body that can be detachably installed inside the water outlet pipe. The water outlet pipe body includes an inlet pipe and an outlet pipe integrally formed at the end of the inlet pipe. The diameter of the inlet pipe is smaller than that of the outlet pipe. A limiting frame is detachably provided at the end of the outlet pipe. A sealing element that can close the inlet pipe is slidably provided on the inner wall of the outlet pipe. A spring is provided between one side of the sealing element and one side of the limiting frame.

[0015] A further improvement is that a guide tube is provided at the center of the limiting frame, and a sliding rod is provided on one side of the sealing element, with the outer wall of the sliding rod slidably disposed on the inner wall of the guide tube.

[0016] A further improvement is that a sealing ring is fitted on the outer wall of the sealing element.

[0017] A further improvement is that the outer wall of the water outlet pipe is also provided with a connecting thread that can be detachably connected to the water outlet pipe.

[0018] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This invention features a plastic water pipe and valve core inside a metal casing, and a plastic water outlet structure at the outlet pipe position. This ensures that water flowing into the angle valve will not come into contact with the metal casing from the inflow to the outflow, preventing corrosion caused by long-term contact between the metal casing and the water. It also effectively prevents heavy metals contained in the metal casing from dissolving into the water, thus preventing water contamination and making it more hygienic and safe to use.

[0019] The connecting pipe body and the water inlet base of this utility model can be fastened together by the cooperation of the protrusion and the groove. The water inlet base and the opening and closing parts can also be connected by the fastening block and the fastening groove. Therefore, during the installation process, it is only necessary to fasten the parts according to the steps. Compared with the existing water inlet base and opening and closing parts that are connected by screw thread, there is no need to judge the screwing depth of the opening and closing parts and the water inlet base. The installation connection is simpler, and it is only necessary to fasten them together. Moreover, the positioning is more accurate, which effectively prevents water leakage caused by the screwing depth error of the opening and closing parts and the water inlet base.

[0020] This invention features an elastic ring fitted on the middle section of the connecting thread at the bottom of the metal casing. When connecting external water pipes, the elastic ring can replace PTFE tape, allowing for direct screwing in for sealing without the need to wrap PTFE tape. This eliminates the need to rely on experience to determine the number of PTFE tape wraps, making it more convenient and simple to use and reducing installation difficulty.

[0021] This utility model incorporates a plastic water outlet structure inside the outlet pipe. This structure not only isolates the metal outlet pipe but also, when the angle valve is used horizontally, seals the inlet pipe after the water flow is complete via a spring and a sealing element. This prevents residual water inside the angle valve from flowing out of the outlet pipe, thus preventing dripping at the user end and reducing water waste. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the angle valve of this utility model; Figure 2 This is a structural schematic diagram of the angle valve of this utility model from a front view cross section; Figure 3 This is a schematic diagram of the structure of the valve core of this utility model, shown in an exploded top view. Figure 4This is a structural schematic diagram of the valve core of this utility model, viewed from below in an exploded view. Figure 5 This is a three-dimensional structural diagram of the water outlet structure of this utility model; Figure 6 This is a schematic diagram of the front view of the water outlet structure of this utility model. Detailed Implementation

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] See Figure 1-6As shown, the technical solution adopted in this specific embodiment is: a lead-free angle valve, including a plastic water pipe 12 and a metal shell 1 covering the outer wall of the water pipe 12. A plastic valve core 2 is detachably installed on the top of the water pipe 12. The valve core 2 includes a plastic connecting pipe body 21 with an outlet 211 on one side and a plastic inlet base fastened to the bottom of the connecting pipe body 21. The inlet base includes an inlet pipe 25 that is sealed and fitted to the top of the water pipe 12 and an inlet integrally formed on the top surface of the inlet pipe 25. The inlet pipe 25 is fastened to the bottom of the connecting pipe body 21. A rotating block 26 that can close the inlet is movably engaged at the top of the inlet pipe 25. The inner wall of the top of the connecting pipe body 21 is also detachably engaged with a bottom end that is detachably fastened to the inlet base. The closing and opening / closing components include a rotating rod 24 that is detachably and movablely engaged with the inner wall of the top of the connecting pipe body 21, and a fastening block 241 disposed at the bottom of the rotating rod 24. The top surface of the rotating block 241 is provided with a fastening groove 261 that can be detachably fastened with the bottom of the opening / closing component. The fastening block 241 and the fastening groove 261 are detachably fastened together. A water outlet pipe 3 is fixedly provided on one side of the metal housing 1. A plastic water outlet structure 31 is detachably installed inside the water outlet pipe 3. The end of the water outlet structure 31 is sealed and fitted to the side wall of the connecting pipe body 21. The water outlet structure 31 includes a plastic water outlet pipe body 311 that is detachably installed inside the water outlet pipe 3. The water outlet pipe body 311 includes an inlet pipe 411 and an outlet pipe 412 integrally formed at the end of the inlet pipe 411. The diameter of the inlet pipe 411 is smaller than that of the outlet pipe. 412, a limiting frame 33 is detachably provided at the end of the outlet pipe 412, and a sealing element 314 that can seal the inlet pipe 411 is slidably provided on the inner wall of the outlet pipe 412. A spring 316 is provided between one side of the sealing element 314 and one side of the limiting frame 33. In use, the bottom of the metal housing 1 of the angle valve is inserted into the inlet water pipe, and an outlet pipe is connected to its outlet pipe 3. Then, the water in the inlet pipe can be sent into the water pipe 12, and through the valve core 2, it is output to the outlet pipe 311 of the outlet structure 31 installed in the outlet pipe 3. Since the valve core 2, the water pipe 12, and the outlet structure 31 are all made of plastic material, the water will not come into contact with the metal housing 1 from the inflow to the outflow after entering the angle valve, thus avoiding metal contamination. The outer casing 1 corrodes due to prolonged contact with water flow. This also effectively prevents heavy metals within the metal casing 1 from dissolving into the water, thus preventing water contamination and making it more hygienic and safer to use. During use, the valve core 2 controls the opening and closing of the angle valve. When installing the valve core 2, first, fasten the water inlet pipe 25 at the bottom of the water inlet base to the bottom of the connecting pipe body 21. Then, insert the rotating rod 24 of the opening / closing element from the top of the connecting pipe body 21, and engage the fastening block 241 at its bottom with the fastening groove 261 on the rotating block 26 of the water inlet base. This allows for quick connection of the opening / closing element and the rotating block 26. During installation, simply follow the steps to fasten the components. Compared to existing water inlet bases and opening / closing elements that are connected by screw threads, this method is much more efficient.There's no need to judge the screw-in depth of the opening / closing element and the water inlet base, making installation and connection simpler; just snap them together. Positioning is also more accurate, effectively preventing leakage caused by errors in the screw-in depth of the opening / closing element and the water inlet base. When water needs to flow through the angle valve, rotate the rotating rod 24, causing the rotating block 26 to rotate synchronously, thus misaligning it with the water inlet at the top of the water inlet pipe 25. Water can then flow through the water inlet at the top of the water inlet pipe 25 into the connecting pipe body 21, and then flow from the water outlet 211 on one side of the connecting pipe body 21 into the water outlet pipe 3. The water outlet structure 31 discharges water outwards. When it is necessary to close the angle valve, the rotating rod 24 is reversed, causing the rotating block 26 to re-close the inlet, thereby closing the angle valve. During the water discharge process, the water flow enters the water outlet pipe 311 of the water outlet structure 31, first entering the inlet pipe 411 of the water outlet pipe 311. The water outlet pipe 311 is entirely made of plastic material, which can isolate the water flow from the metal-formed water outlet pipe 3. After the water flow enters the inlet pipe 411, pressure is generated and applied to the seal 314. When When the water pressure reaches a certain value, the seal 314 is pushed in the direction of water flow, thereby losing its sealing effect on the inlet pipe 411. Simultaneously, the spring 316 between the limiting frame 33 and the seal 314 is compressed, generating elastic force. The pressure at which the water pressure pushes open the seal 314 varies depending on the spring coefficient of the selected spring 316. A higher spring coefficient allows for higher pressure and velocity of the outflowing water, making it suitable for applications requiring high-pressure water flow. At this point, the water can flow smoothly through the inlet pipe 411. 1. Water flows out from the outlet pipe 412. After the water flow ends, the elastic force of the spring 316 is applied to the seal 314, causing the seal 314 to be pushed back by the spring 316 and its end to re-fit against the end of the inlet pipe 411. This allows the seal 314 to re-close the inlet pipe 411. If the angle valve is horizontal and there is residual water inside after use, the seal 314 will close the inlet pipe 411, preventing the residual water from flowing out through the inlet pipe 411, thus preventing dripping at the outlet and reducing water waste. The outer wall of the inlet pipe 25 is integrally formed with a locking block 251, and the inner wall of the bottom of the connecting pipe body 21 is integrally formed with a locking groove 212. The inlet pipe 25 is locked into the locking groove 212 by the locking block 251 and fastened to the bottom of the connecting pipe body 21. This facilitates the quick positioning of the inlet pipe 25 and the fastening groove 212 to the bottom of the connecting pipe body 21, further improving the ease of installation of the valve core 2. The top of the connecting pipe body 21 is fitted with a connecting block 23 for connecting to the top of the water pipe 12, which facilitates the quick installation of the connecting pipe body 21 into the top of the water pipe 12 through the connecting block 23, making the installation more convenient and simple. The water outlet pipe 3 is set on the metal shell 1 at the corresponding position of the water outlet 211. The end of the water outlet structure 31 is aligned with the water outlet 211, which is beneficial to allow the water to flow directly into the water outlet structure 31 through the water outlet 211 after it is output. This allows the water to flow out without having to go through a bend or through a cavity, so that the water outlet end can obtain a larger flow rate. The bottom surface of the inlet pipe 25 is also provided with a silicone gasket 252, which helps to improve the sealing between the bottom surface of the inlet pipe 25 and the top surface of the water pipe 12 and prevent water leakage. The bottom outer wall of the metal shell 1 is integrally formed with connecting threads. An elastic ring 13 is also fitted on the bottom outer wall of the metal shell 1 at the middle of the connecting threads. During the process of connecting the connecting threads at the bottom of the metal shell 1 with the external water inlet pipe, the elastic ring 13 replaces the PTFE tape. During the screwing process, the elastic ring 13 deforms. The elastic ring 13 can be made of rubber or silicone. When deformed, it fills the gap between the connecting threads and the threads of the external water pipe by compression deformation, so that the gap between the threads of the external water pipe and the connecting threads is filled and sealed. Therefore, during the connection, there is no need to wrap PTFE tape. It can be directly screwed into the metal shell 1 for sealing. There is no need to judge the number of PTFE tape wrapping by experience. It is more convenient and simple to use and reduces the installation difficulty. The elastic ring 13 has a frustum-shaped ring structure. The end of the elastic ring 13 with a smaller outer diameter faces downwards. This makes it easier to reduce the resistance to screwing in the elastic ring 13 at the beginning of the screwing process by using the smaller outer diameter facing downwards. After screwing in, the larger outer diameter at the bottom can achieve a better deformation and filling effect, making screwing in easier and more convenient. The center of the limiting frame 33 is provided with a guide tube 317, and the side of the seal 314 is provided with a sliding rod 313. The outer wall of the sliding rod 313 is slidably disposed on the inner wall of the guide tube 317, which helps to make the movement trajectory of the seal 314 more straight under the action of the sliding rod 313 and the guide tube 317, and prevents it from moving skewedly and affecting the reset sealing effect. A sealing ring 315 is fitted on the outer wall of the sealing element 314, which helps to improve the sealing effect of the sealing element 314 on the inlet pipe 411 and prevent water leakage. The outer wall of the water outlet pipe body 311 is also provided with a connecting thread 312 that can be detachably connected to the water outlet pipe 3, which makes it easier and simpler to install the water outlet pipe body 311 into the water outlet pipe 3.

[0026] All of the above-mentioned plastic parts can be preferably made of polypropylene.

[0027] The working principle of this utility model is as follows: When using this utility model, the bottom of the metal housing 1 of the angle valve is inserted into the inlet water pipe, and an outlet pipe is connected to its outlet pipe 3. Water from the inlet pipe is then fed into the through pipe 12 and, through the valve core 2, outputs to the outlet pipe through the outlet structure 311 mounted in the outlet pipe 3. Since the valve core 2, through pipe 12, and outlet structure 31 are all made of plastic, the water does not come into contact with the metal housing 1 from the inflow to the outflow, preventing corrosion caused by prolonged contact with the water. This also effectively prevents heavy metals contained in the metal housing 1 from dissolving into the water, thus preventing water contamination and making it more hygienic to use. Safety is ensured during use. The valve core 2 controls the opening and closing of the angle valve. During installation, the inlet pipe 25 at the bottom of the inlet base is first fastened to the bottom of the connecting pipe body 21. The rotating rod 24 of the opening / closing element extends from the top of the connecting pipe body 21, and its bottom fastening block 241 engages with the fastening groove 261 on the rotating block 26 of the inlet base. This allows for quick connection of the opening / closing element and the rotating block 26. During installation, simply fasten the components according to the steps. Compared to existing threaded connections between the inlet base and the opening / closing element, there is no need to determine the screw-in depth of the opening / closing element and the inlet base. Installation is simpler, requiring only fastening, and positioning is more accurate, effectively preventing damage to the opening / closing element and the inlet base. Leakage caused by the error in the screw-in depth is addressed by rotating the rotating rod 24 when water needs to flow through the angle valve. This causes the rotating block 26 to rotate synchronously, thus disaligning it with the inlet at the top of the inlet pipe 25. Water then flows through the inlet at the top of the inlet pipe 25 into the connecting pipe 21, and from the outlet 211 on one side of the connecting pipe 21 into the outlet structure 31 in the outlet pipe 3, and is discharged outwards. When the angle valve needs to be closed, the rotating rod 24 is reversed, causing the rotating block 26 to re-close the inlet, thereby closing the angle valve. During the water discharge process, the water flows into the outlet pipe 311 of the outlet structure 31, first entering the inlet pipe 411 of the outlet pipe 311. After entering the inlet pipe 411, the water will... Pressure is generated and applied to the seal 314. When the water pressure reaches a certain value, the seal 314 is pushed in the direction of water flow, thereby losing its sealing effect on the inlet pipe 411. At the same time, the spring 316 between the limiting frame 33 and the seal 314 is squeezed, causing it to generate elastic force. At this time, the water can flow smoothly through the inlet pipe 411 and out through the outlet pipe 412. After the water is discharged, the elastic force of the spring 316 is applied to the seal 314, causing the seal 314 to be pushed back and adhered to the end of the inlet pipe 411, thereby sealing the inlet pipe 411. If the angle valve is horizontal and there is residual water inside, it will not flow out through the inlet pipe 411, preventing dripping at the outlet and reducing water waste.

[0028] This utility model aims to protect the structure of the product. The model numbers of the components are not the focus of this utility model's protection, as they are common technology. Any component on the market that can achieve the functions described above can be used as an option. Therefore, the model numbers and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the various components.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A leadless angle valve characterized by: The device includes a plastic water pipe (12) and a metal shell (1) covering the outer wall of the water pipe (12). A plastic valve core (2) is detachably installed on the top of the water pipe (12). The valve core (2) includes a plastic connecting pipe body (21) with a water outlet (211) on one side and a plastic water inlet base that is fastened to the bottom of the connecting pipe body (21). The inner wall of the top of the connecting pipe body (21) is also detachably and movablely fitted with an opening and closing component whose bottom end is detachably fastened to the water inlet base. A water outlet pipe (3) is fixedly provided on one side of the metal shell (1). A plastic water outlet structure (31) is detachably installed inside the water outlet pipe (3). The end of the water outlet structure (31) is sealed and fitted to the side wall of the connecting pipe body (21).

2. A leadless angular valve according to claim 1, characterized in that: The water inlet base includes a water inlet pipe (25) that is sealed and fitted to the top of the water pipe (12) and a water inlet integrally formed on the top surface of the water inlet pipe (25). The water inlet pipe (25) is fastened to the bottom of the connecting pipe body (21). The top of the water inlet pipe (25) is movably engaged with a rotating block (26) that can close the water inlet. The top surface of the rotating block (26) is provided with a fastening groove (261) that can be detachably fastened to the bottom of the opening and closing component.

3. A leadless angular valve according to claim 2, wherein: The outer wall of the water inlet pipe (25) is integrally formed with a locking block (251), and the inner wall of the bottom of the connecting pipe body (21) is integrally formed with a locking groove (212). The water inlet pipe (25) is locked into the locking groove (212) by the locking block (251) and fastened to the bottom of the connecting pipe body (21).

4. A leadless angular valve according to claim 1, wherein: The top of the connecting pipe (21) is fitted with a connecting block (23) for connecting to the top of the water pipe (12).

5. A leadless angular valve according to claim 1, wherein: The water outlet pipe (3) is located on the metal shell (1) at the corresponding position of the water outlet (211), and the end of the water outlet structure (31) is aligned with the water outlet (211).

6. A leadless angular valve according to claim 2, wherein: The opening and closing component includes a rotating rod (24) that can be detachably and movablely engaged with the inner wall of the top of the connecting tube (21) and a fastening block (241) disposed at the bottom of the rotating rod (24). The fastening block (241) is detachably fastened to the fastening groove (261).

7. A leadless angular valve according to claim 2, wherein: The bottom surface of the water inlet pipe (25) is also provided with a silicone gasket (252).

8. A leadless angular valve according to claim 1, wherein: The bottom outer wall of the metal shell (1) is integrally formed with connecting threads, and an elastic ring (13) is also fitted on the bottom outer wall of the metal shell (1) at the middle section of the connecting threads.

9. A leadless angular valve according to claim 8, wherein: The elastic ring (13) has a frustum-shaped structure, with the end of the elastic ring (13) with a smaller outer diameter facing downwards.

10. A leadless angular valve according to claim 1 or 5, wherein: The water outlet structure (31) includes a plastic water outlet pipe body (311) that can be detachably installed inside the water outlet pipe (3). The water outlet pipe body (311) includes an inlet pipe (411) and an outlet pipe (412) integrally formed at the end of the inlet pipe (411). The diameter of the inlet pipe (411) is smaller than that of the outlet pipe (412). A limiting frame (33) is detachably provided at the end of the outlet pipe (412). A sealing element (314) that can close the inlet pipe (411) is slidably provided on the inner wall of the outlet pipe (412). A spring (316) is provided between one side of the sealing element (314) and one side of the limiting frame (33).

11. A leadless angular valve according to claim 10, wherein: The limiting frame (33) has a guide tube (317) at its center, and the sealing element (314) has a sliding rod (313) on one side. The outer wall of the sliding rod (313) is slidably disposed on the inner wall of the guide tube (317).

12. A leadless angular valve according to claim 10, wherein: The outer wall of the sealing element (314) is fitted with a sealing ring (315).

13. A leadless angular valve according to claim 10, wherein: The outer wall of the water outlet pipe body (311) is also provided with a connecting thread (312) that can be detachably connected to the water outlet pipe (3).

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