Water faucet valve element inner pipe sealing structure

Abstract

According to the faucet valve element inner pipe sealing structure, a valve element comprises a water outlet, and further comprises an inner pipe, a first sealing piece and a second sealing piece, the inner pipe comprises a connecting end, the connecting end is connected with the water outlet, the inner wall of the water outlet is provided with a first conical surface, the outer wall of the connecting end is provided with a second conical surface, and the first conical surface is provided with a first sealing groove; the first sealing piece is located in the first sealing groove, the end, away from the first sealing groove, of the first sealing piece is provided with a lip portion, the lip portion is in sealing fit with the second conical surface, the outer wall of the connecting end is sleeved with a second sealing piece, the second sealing piece is elastic, the inner wall of the water outlet is provided with a limiting groove, and the outer wall of the second sealing piece is in sealing fit with the inner wall of the limiting groove. The connecting end comprises the annular step portion, the end opening of the water outlet is provided with the annular groove matched with the annular step portion, the annular step portion is in interference fit with the annular groove, the first sealing piece and the second sealing piece are arranged, double sealing is achieved, and the sealing performance of the faucet valve element inner pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of faucet valve core technology, and in particular to a sealing structure for the inner tube of a faucet valve core. Background Technology

[0002] As people become more aware of drinking water safety, the safety of the materials used in faucets, which are the final components that come into direct contact with domestic water, and their anti-pollution performance have become key concerns for consumers. Traditional faucets typically use metal (such as copper or stainless steel) as the outer shell, which, while possessing good strength and corrosion resistance, leaves the internal water flow channels in direct contact with the metal shell.

[0003] In practical use, when the metal casing is in long-term contact with water (especially tap water containing chlorine, acid, or minerals), heavy metals (such as lead and copper ions) may be released due to electrochemical corrosion or material leaching, causing water pollution and threatening human health. For example, after long-term use, the inner wall of a copper faucet may develop verdigris (basic copper carbonate) due to oxidation or chloride ion corrosion, and some harmful substances may enter the drinking water with the water flow. Metal parts containing lead solder or plating may also release lead ions into the water due to wear or corrosion, posing a risk of chronic poisoning. To solve this problem, some valve cores are equipped with an inner tube connected to the outlet of the valve core, isolating the water flow from the metal shell and effectively preventing the metal shell from directly contacting the water source. This avoids the problem of heavy metal leaching and water pollution caused by electrochemical corrosion or material leaching. The inner tube is made of non-metallic materials, and the outer wall of the inner tube connection end is sealed to the inner wall of the outlet through interference fit. However, non-metallic inner tubes (especially flexible materials) are prone to plastic deformation under long-term water flow impact or temperature changes (such as in hot water faucets), and the interference fit gradually decreases, leading to seal failure. Water leaks from the connection and comes into contact with the metal shell, affecting its use. Therefore, it is necessary to improve this design. Utility Model Content

[0004] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a sealing structure for the inner tube of a faucet valve core. The structure is simple and reasonable, and easy to operate. By setting the inner tube, direct contact between water and the metal shell of the faucet can be avoided, thereby improving water safety, preventing metal contamination, and extending the service life of the faucet. The first sealing element and the second sealing element are set to achieve double sealing and improve the sealing performance of the inner tube of the faucet valve core.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model relates to a sealing structure for the inner tube of a faucet valve core. The valve core includes a water outlet, an inner tube, a first sealing element, and a second sealing element. The inner tube includes a connecting end, at least a portion of which extends into and connects to the water outlet. At least a portion of the outer wall of the connecting end seals against at least a portion of the inner wall of the water outlet. The inner wall of the water outlet has a first conical surface, and the outer wall of the connecting end has a second conical surface that mates with the first conical surface. The first conical surface has a first sealing groove, and the first sealing element is located within the first sealing groove. The end of the first sealing element away from the first sealing groove has a lip portion that seals against the second conical surface. The outer wall of the connecting end is fitted with the second sealing element, which is elastic. The inner wall of the water outlet has a limiting groove that mates with the second sealing element, and the outer wall of the second sealing element seals against the inner wall of the limiting groove. The connecting end includes an annular stepped portion, and the port of the water outlet has an annular groove that mates with the annular stepped portion. The annular stepped portion and the annular groove are interference-fitted.

[0007] Furthermore, the lip portion is configured in a "Y" shape, and the opening of the lip portion faces the second conical surface.

[0008] Furthermore, the outer wall of the connecting end has a second sealing groove, the second sealing member is located in the second sealing groove, one end of the second sealing member abuts against the bottom of the second sealing groove, and the other end of the second sealing member abuts against the inner wall of the limiting groove.

[0009] Furthermore, the valve core also includes a housing, a valve plate assembly, and a handle assembly for controlling the operation of the valve plate assembly. The valve plate assembly is located inside the housing, and the handle assembly is connected to the valve plate assembly. The upper end of the handle assembly extends outside the housing. The housing is provided with an inlet and an outlet, and a water flow channel is provided between the inlet and the outlet. The valve plate assembly is used to control the opening and closing of the water flow channel.

[0010] Furthermore, there are two water inlets, both located at the bottom of the outer casing, and the water outlet is located on the side wall of the outer casing.

[0011] Furthermore, the valve plate assembly includes a paddle, a first valve plate, and a second valve plate arranged sequentially from top to bottom. The handle assembly is connected to the paddle, and the paddle is inserted into the first valve plate. The lower end face of the first valve plate is provided with a mixing chamber. The second valve plate has a water inlet and a water outlet. The water inlet corresponds to and is connected to the water outlet, and the water outlet corresponds to and is connected to the water outlet. The water inlet is connected to the water outlet through the mixing chamber.

[0012] Furthermore, the outer casing has a water outlet cavity, and the water outlet hole is connected to the water outlet through the water outlet cavity.

[0013] Furthermore, a sealing ring is provided between the lower end of the second valve plate and the outer casing.

[0014] Furthermore, the valve core also includes a pressure cap, the upper end of the housing is open, the pressure cap is located at the upper end of the housing and is fixedly connected to the housing, the housing and the pressure cap cooperate to form an accommodating cavity, the valve plate assembly and the handle assembly are located in the accommodating cavity, and the upper end of the handle assembly extends out of the pressure cap.

[0015] Furthermore, the lower end of the pressure cap has a first insert, and the upper end of the outer shell has a first slot that mates with the first insert.

[0016] The beneficial effects of this utility model are as follows: The sealing structure of the inner tube of the faucet valve core described in this utility model can effectively prevent water from directly contacting the metal shell of the faucet by setting the inner tube, which not only significantly improves the safety of water use and prevents possible metal contamination, but also further extends the overall service life of the faucet. By setting the first sealing element and the second sealing element, a double sealing guarantee is achieved, which greatly improves the sealing performance of the inner tube of the faucet valve core. The lip design of the first sealing element deforms during the insertion of the inner tube to ensure a tight fit with the second conical surface, enhancing the sealing effect. In addition, by setting the second sealing element, the sealing performance is further improved, and the axial movement of the inner tube is restricted to a certain extent, which enhances the stability of the connection. At the same time, the cooperation between the annular step and the annular groove not only restricts the excessive insertion of the inner tube, but also provides the operator with a clear basis for judging whether the assembly is in place, avoiding damage to the sealing element or the inner tube due to improper operation, effectively improving the sealing reliability and service life of the inner tube of the faucet valve core. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0019] Figure 3 This is a schematic diagram of the exploded structure of the valve core.

[0020] Figures 1-3In the middle section: 1. Valve core; 11. Outer shell; 111. Water outlet chamber; 112. First slot; 12. Water outlet; 121. First conical surface; 1211. First sealing groove; 122. Limiting groove; 123. Annular groove; 13. Pressure cap; 131. First insert block; 2. Inner tube; 21. Connecting end; 211. Second conical surface; 212. Second sealing groove; 213. Annular step portion; 3. First sealing element; 31. Lip portion; 4. Second sealing element; 51. Paddle; 511. Connecting groove; 52. First valve plate; 521. Mixing chamber; 53. Second valve plate; 531. Water outlet hole; 54. Sealing ring; 61. Handle body; 611. Connecting part; 612. First insertion hole; 62. Rotating seat; 621. Second insertion hole; 63. Pin shaft. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1-3The diagram illustrates a sealing structure for the inner tube of a faucet valve core. The valve core 1 includes a water outlet 12, an inner tube 2, a first sealing element 3, and a second sealing element 4. The inner tube 2 includes a connecting end 21, at least a portion of which extends into and connects to the water outlet 12. At least a portion of the outer wall of the connecting end 21 seals against at least a portion of the inner wall of the water outlet 12. In this invention, the inner tube 2 is a flexible hose made of non-metallic material. By using the inner tube 2, direct contact between water and the metal outer shell 11 of the faucet can be effectively prevented, significantly improving water safety, preventing potential metal contamination, and further extending the overall service life of the faucet. The inner wall of the water outlet 12 has a first cone shape. The outer wall of the connecting end 21 has a second conical surface 211 that mates with the first conical surface 121. The first conical surface 121 has a first sealing groove 1211. The first sealing element 3 is located within the first sealing groove 1211. The end of the first sealing element 3 away from the first sealing groove 1211 has a lip 31. The lip 31 seals against the second conical surface 211. Preferably, in this embodiment, the lip 31 is Y-shaped, with its opening facing the second conical surface 211. When the inner tube 2 is inserted into the outlet 12, the lip 31 is squeezed by the second conical surface 211, undergoes elastic deformation, and fits tightly against the second conical surface 211, achieving dynamic sealing with good sealing performance. A second sealing element 4 is fitted onto the outer wall of end 21. The second sealing element 4 is elastic. The inner wall of the outlet 12 has a limiting groove 122 that mates with the second sealing element 4. The outer wall of the second sealing element 4 seals against the inner wall of the limiting groove 122. Specifically, the outer wall of the connecting end 21 has a second sealing groove 212. The second sealing element 4 is located within the second sealing groove 212. One end of the second sealing element 4 abuts against the bottom of the second sealing groove 212, and the other end abuts against the inner wall of the limiting groove 122. When the inner tube 2 is inserted into the outlet 12, the second sealing element 4 is compressed. When the second sealing element 4 is embedded in the limiting groove 122, the second sealing element 4 returns to its original shape, and its outer wall seals against the limiting groove 122. The inner wall of the inner tube 2 fits tightly, further enhancing the sealing effect and effectively preventing water leakage. In addition, the second sealing element 4 cooperates with the limiting groove 122, which can limit the axial movement of the inner tube 2 to a certain extent, ensuring the stability of the connection and good sealing performance. The connecting end 21 includes an annular step portion 213, and the port of the outlet 12 has an annular groove 123 that cooperates with the annular step portion 213, limiting the excessive insertion of the inner tube 2. When the inner tube 2 is inserted until the annular step portion 213 is fully embedded in the annular groove 123, the operator can clearly judge that the assembly is in place, avoiding damage to the sealing element or the inner tube 2 caused by excessive force due to excessive compression deformation. The annular step portion 213 and the annular groove 123 are interference fit to ensure the stability and reliability of the connection.

[0023] This invention achieves dual sealing protection by setting a first sealing element 3 and a second sealing element 4, which greatly improves the sealing performance of the inner tube 2 of the faucet valve core 1. The lip 31 of the first sealing element 3 is designed to deform during the insertion of the inner tube 2, ensuring a tight fit with the second conical surface 211 and enhancing the sealing effect. In addition, by setting the second sealing element 4, the sealing performance is further improved, and the axial movement of the inner tube 2 is restricted to a certain extent, which enhances the stability of the connection. At the same time, the cooperation between the annular step 213 and the annular groove 123 not only restricts the excessive insertion of the inner tube 2, but also provides the operator with a clear basis for judging whether the assembly is in place, avoiding damage to the sealing element or the inner tube 2 due to improper operation, and effectively improving the sealing reliability and service life of the inner tube 2 of the faucet valve core 1.

[0024] Preferably, in this embodiment, the valve core 1 further includes a housing 11, a valve plate assembly, and a handle assembly for controlling the operation of the valve plate assembly. The valve plate assembly is located inside the housing 11, and the handle assembly is connected to the valve plate assembly. The upper end of the handle assembly extends outside the housing 11 so that the operator can easily operate it. The housing 11 is provided with an inlet and an outlet 12, and there is a water flow channel between the inlet and the outlet 12. The valve plate assembly is used to control the opening and closing of the water flow channel.

[0025] Preferably, in this embodiment, there are two water inlets, corresponding to cold water and hot water inputs respectively. Both water inlets are located at the bottom of the outer casing 11. (See reference...) Figure 3 The water outlet 12 is located on the side wall of the outer casing 11, and the function of mixing hot and cold water or allowing them to flow out separately can be realized through the adjustment of the valve plate assembly.

[0026] Preferably, in this embodiment, refer to Figure 3 The valve assembly includes a lever 51, a first valve 52, and a second valve 53 arranged sequentially from top to bottom. The handle assembly is connected to the lever 51, and the lever 51 is inserted into the first valve 52. The lower end face of the first valve 52 is provided with a mixing chamber 521. The second valve 53 has a water inlet and a water outlet 531. The water inlet corresponds to and is connected to the water inlet. There are two water inlets and two water inlets. The water outlet 531 corresponds to and is connected to the water outlet 12. The two water inlets are connected to the water outlet 531 through the mixing chamber 521. The first lever 51 is controlled to slide on the second lever 51 by the handle assembly, thereby controlling the water flow and the mixing ratio of hot and cold water.

[0027] Preferably, in this embodiment, a sealing ring 54 is provided between the lower end of the second valve plate 53 and the outer shell 11 to prevent water leakage and improve sealing performance.

[0028] Preferably, in this embodiment, refer to Figure 1 The outer casing 11 has a water outlet cavity 111, and the water outlet 531 is connected to the water outlet 12 through the water outlet cavity 111. By setting the water outlet cavity 111, the water flows more smoothly in the valve core 1, reducing the resistance of the water flow and improving the efficiency of the water flow.

[0029] Specifically, see Figure 3 The handle assembly includes a handle body 61 and a rotating seat 62. The rotating seat 62 is rotatably disposed within the housing 11. The handle body 61 is movably connected to the rotating seat 62 via a connector. The upper end of the handle body 61 extends outside the housing 11, and the lower end of the handle body 61 is provided with a connecting part 611. The upper end surface of the paddle 51 is provided with a connecting groove 511 that corresponds to and mates with the connecting part 611. The connecting part 611 and the connecting groove 511 are connected to ensure a stable and reliable connection between the handle body 61 and the paddle 51. Specifically, the connecting part 611 has a ball-head design, and the shape of the connecting groove 511 is adapted to the shape of the connecting part 611. Preferably, the connecting member is a pin 63. The handle body 61 is provided with a first insertion hole 612 for the pin 63 to pass through, and the rotating seat 62 is provided with a second insertion hole 621 for the pin 63 to pass through. The handle body 61 can rotate along the axis of the pin 63. The handle body 61 controls the lever 51 to drive the first valve plate 52 to slide on the second valve plate 53, thereby controlling the water flow switch and the flow rate.

[0030] Preferably, in this embodiment, refer to Figure 3 The valve core 1 also includes a pressure cap 13. The upper end of the housing 11 is open. The pressure cap 13 is located at the upper end of the housing 11 and is fixedly connected to the housing 11. The housing 11 and the pressure cap 13 cooperate to form a receiving cavity. The valve plate assembly and the handle assembly are located in the receiving cavity. The upper end of the handle assembly extends out of the pressure cap 13. The pressure cap 13 is provided to facilitate disassembly and maintenance.

[0031] Preferably, in this embodiment, the lower end of the pressure cap 13 has a first insert 131, and the upper end of the outer shell 11 has a first slot 112 that cooperates with the first insert 131, so that the connection between the pressure cap 13 and the outer shell 11 is more stable and less prone to loosening. In addition, this plug-in cooperation method simplifies the installation process and improves assembly efficiency.

[0032] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A sealing structure for the inner tube of a faucet valve core, wherein the valve core (1) includes a water outlet (12), characterized in that: It also includes an inner tube (2), a first sealing element (3), and a second sealing element (4). The inner tube (2) includes a connecting end (21), at least a portion of which extends into and connects to the outlet (12). At least a portion of the outer wall of the connecting end (21) seals against at least a portion of the inner wall of the outlet (12). The inner wall of the outlet (12) has a first conical surface (121), and the outer wall of the connecting end (21) has a second conical surface (211) that mates with the first conical surface (121). The first conical surface (121) has a first sealing groove (1211), and the first sealing element (3) is located within the first sealing groove (1211). (3) The end away from the first sealing groove (1211) has a lip (31), the lip (31) is sealed to the second conical surface (211), the outer wall of the connecting end (21) is fitted with a second sealing element (4), the second sealing element (4) is elastic, the inner wall of the outlet (12) has a limiting groove (122) that cooperates with the second sealing element (4), the outer wall of the second sealing element (4) is sealed to the inner wall of the limiting groove (122), the connecting end (21) includes an annular step (213), the port of the outlet (12) has an annular groove (123) that cooperates with the annular step (213), the annular step (213) and the annular groove (123) are interference fit.

2. The sealing structure of the inner tube of a faucet valve core according to claim 1, characterized in that: The lip portion (31) is Y-shaped, and the opening of the lip portion (31) faces the second conical surface (211).

3. The sealing structure of the inner tube of a faucet valve core according to claim 1, characterized in that: The outer wall of the connecting end (21) has a second sealing groove (212), the second sealing element (4) is located in the second sealing groove (212), one end of the second sealing element (4) abuts against the bottom of the second sealing groove (212), and the other end of the second sealing element (4) abuts against the inner wall of the limiting groove (122).

4. The sealing structure of the inner tube of a faucet valve core according to claim 1, characterized in that: The valve core (1) also includes a housing (11), a valve plate assembly, and a handle assembly for controlling the operation of the valve plate assembly. The valve plate assembly is located inside the housing (11). The handle assembly is connected to the valve plate assembly. The upper end of the handle assembly extends out of the housing (11). The housing (11) is provided with an inlet and an outlet (12). There is a water flow channel between the inlet and the outlet (12). The valve plate assembly is used to control the opening and closing of the water flow channel.

5. The sealing structure of the inner tube of a faucet valve core according to claim 4, characterized in that: There are two water inlets, both located at the bottom of the outer shell (11), and the water outlet (12) is located on the side wall of the outer shell (11).

6. The sealing structure of the inner tube of a faucet valve core according to claim 4, characterized in that: The valve plate assembly includes a paddle (51), a first valve plate (52), and a second valve plate (53) arranged sequentially from top to bottom. The handle assembly is connected to the paddle (51), and the paddle (51) is inserted into the first valve plate (52). The lower end face of the first valve plate (52) is provided with a mixing chamber (521). The second valve plate (53) has a water inlet and a water outlet (531). The water inlet corresponds to and is connected to the water inlet, and the water outlet (531) corresponds to and is connected to the water outlet (12). The water inlet is connected to the water outlet (531) through the mixing chamber (521).

7. The sealing structure of the inner tube of a faucet valve core according to claim 6, characterized in that: The outer shell (11) has a water outlet cavity (111), and the water outlet hole (531) is connected to the water outlet (12) through the water outlet cavity (111).

8. The sealing structure of the inner tube of a faucet valve core according to claim 6, characterized in that: A sealing ring (54) is provided between the lower end of the second valve plate (53) and the outer shell (11).

9. The sealing structure of the inner tube of a faucet valve core according to claim 4, characterized in that: The valve core (1) also includes a pressure cap (13). The upper end of the outer shell (11) is open. The pressure cap (13) is located at the upper end of the outer shell (11) and is fixedly connected to the outer shell (11). The outer shell (11) and the pressure cap (13) cooperate to form a receiving cavity. The valve plate assembly and the handle assembly are located in the receiving cavity. The upper end of the handle assembly extends out of the pressure cap (13).

10. The sealing structure of the inner tube of a faucet valve core according to claim 9, characterized in that: The lower end of the cap (13) has a first insert (131), and the upper end of the outer shell (11) has a first slot (112) that mates with the first insert (131).

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