Leakage-proof faucet based on gradient sealing ring structure

Abstract

The invention relates to the technical field of fluid control valves, in particular to a drip-proof faucet based on a gradient sealing ring structure, which is applied to a water pipe and comprises a faucet body, a discharge nozzle, a valve seat, a valve core, a handle, a sealing ring and a pressure regulating assembly, the faucet body is connected to the upper end of the water pipe, and the discharge nozzle is connected to the left side of the faucet body; the valve seat is connected to the lower side of an inner cavity of the faucet body, the valve element is connected to the upper side of the inner cavity of the faucet body, the handle is connected to the upper end of the valve element, the lower side of the outer wall of the valve element is sleeved with the sealing ring, the outer wall of the sealing ring is connected with a leather cup, and the pressure adjusting assembly is connected to the valve element. The fitting pressure of the sealing ring and the valve seat is dynamically adjusted according to the water flow pressure, the contact pressure of the sealing ring and the valve seat is improved when the water flow pressure is high, the sealing effect is guaranteed, pressure relief is conducted on the sealing ring when the water flow pressure is low, and the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of fluid control valves, in particular to an anti-drip faucet based on a gradient sealing ring structure. Background Art

[0002] Faucets are common fluid control devices, widely used in homes, businesses, and industry. One of their core components is the sealing ring, which follows the faucet's valve core as it descends, sealing the valve body and effectively blocking and controlling water flow, preventing leakage.

[0003] During normal faucet operation, water flows through the valve body and into the valve core area. Rotating the handle, for example, causes the valve core to engage or disengage with the water inlet, opening and closing the water flow. A sealing ring is typically installed between the valve core and the valve body. When the handle is fully engaged, the sealing ring tightly fits against the contact surface between the two, preventing water from leaking through the gap between the two, thus providing a seal. To meet the demands of high-rise buildings, such as rapid water flow and strong water flow, some commercial facilities use high-pressure pumps to deliver high-pressure water. However, when the faucet is closed, the pressure of the high-pressure water acts on the contact surfaces of the sealing ring, the valve core, and the valve body, creating tiny gaps between the sealing ring, the valve core, and the valve body. Water can leak through these gaps, causing dripping. This dripping not only wastes water resources but also causes water accumulation and leakage around the faucet, impacting the faucet's lifespan and user experience.

[0004] Several solutions have been proposed in the prior art to address the aforementioned issues. For example, by increasing the pressure between the sealing ring and the valve seat, the sealing ring is tightly fitted to the valve seat, thereby avoiding the tiny gaps between the sealing ring and the contact surfaces of the valve core and valve body caused by high-pressure water, thereby improving the sealing effect. However, maintaining high pressure on the sealing ring for extended periods of time can easily lead to stress relaxation and creep in the sealing ring, which in turn reduces the sealing effect and causes faucet leakage.

[0005] Therefore, an anti-drip faucet based on a gradient sealing ring structure is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a drip-proof faucet based on a gradient sealing ring structure, which solves the problem that the sealing ring is prone to creep deformation and dripping when it is subjected to high pressure for a long time; by setting a pressure regulating component, when water flows on the pressure regulating component, the pressure regulating component will move up different distances according to the water pressure, thereby dynamically adjusting the fitting pressure of the sealing ring and the valve seat according to the pressure of the water flow, increasing the contact pressure between the sealing ring and the valve seat when the water flow pressure is high, ensuring the sealing effect, thereby achieving the effect of saving water resources, and relieving the pressure on the sealing ring when the water flow pressure is low, thereby increasing the service life of the sealing ring, thereby achieving the effect of improving the use experience of the faucet.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] When the faucet is in contact with the valve body, the sealing ring is sleeved on the lower side of the outer wall of the valve core, and the outer wall of the sealing ring is connected to the upper and lower pressure chambers. When the valve core is in contact with the valve seat, the sealing ring is sleeved on the lower side of the outer wall of the valve core, and the outer wall of the sealing ring is connected to the upper and lower pressure chambers. When the water pressure reaches a specified level, the pressure regulating assembly moves upward to squeeze the sealing ring. When the sealing ring is under pressure, the upper pressure chamber increases the contact pressure between the leather cup and the valve seat, and the contact pressure between the leather cup and the valve seat is proportional to the water pressure. When the water pressure drops, the pressure regulating assembly moves downward to reduce the contact pressure between the leather cup and the sealing ring.

[0009] In the prior art, the sealing effect is mainly achieved through the contact pressure between the sealing ring and the valve seat. A larger pressure can easily cause fatigue of the sealing ring, thereby reducing the service life of the sealing ring. Through the above scheme, the pressure regulating component dynamically adjusts the sealing pressure of the sealing ring according to the water pressure, thereby squeezing the sealing ring when the water flow is high pressure, thereby improving the sealing effect, and reducing the pressure of the sealing ring when the water flow is low pressure, thereby increasing the service life of the sealing ring.

[0010] Preferably, the valve seat includes a fixing ring, a groove and a pressure block, the fixing ring is connected to the lower side of the inner cavity of the faucet body, the longitudinal cross-section of the fixing ring is stepped, the groove is opened on the fixing ring, the pressure block is connected to the inner wall of the fixing ring, and when the valve core is in contact with the fixing ring, the leather cup is in contact with the upper end of the pressure block.

[0011] Through the above solution, the valve core and the valve seat fit together, and the leather cup fits together with the upper end of the pressure block, thereby improving the sealing effect of the valve.

[0012] Preferably, a pressure-changing chamber is opened inside the sealing ring, and the outer peripheral surface of the sealing ring is inclined. When the valve core and the valve seat are in contact, the gap between the outer periphery of the sealing ring and the inner wall of the fixed ring gradually increases from top to bottom. The sealing ring is made of a composite of two rubber materials, the lower one is hard and the upper one is soft, and the two materials change gradiently at the pressure-changing chamber.

[0013] Through the above scheme, the sealing ring is made of a composite of soft and hard rubber materials, thereby forming soft and hard sealing surfaces on the inner wall of the valve seat, thereby effectively improving the sealing effect. At the same time, the two materials are gradually changed at the pressure transformer chamber, and the rubber at the pressure transformer chamber gradually softens from bottom to top, so that when the sealing ring is squeezed, the side wall of the pressure transformer chamber and the fixing ring are gradually fitted from top to bottom, thereby achieving pressure on the leather cup from top to bottom, thereby improving the sealing effect.

[0014] Preferably, the valve core includes a sleeve, a screw, a pressure plate, a positioning plate and a protrusion, the sleeve is connected to the upper side of the inner cavity of the faucet body, the screw is connected to the inner wall of the sleeve, and the screw is threadedly connected to the sleeve, the pressure plate is connected to the lower side of the screw, the positioning plate is connected to the lower side of the pressure plate, and the protrusion is connected to the lower end of the positioning plate, and the protrusion matches the shape of the groove.

[0015] Through the above scheme, the protrusion fits with the groove, so that the valve core and the valve seat cooperate to form a primary seal. On the one hand, the sealing effect is improved and water dripping is reduced. On the other hand, the direct pressure of the water flow on the sealing ring is avoided, thereby increasing the service life of the sealing ring. At the same time, the water pressure is transferred to the pressure regulating component, so that the pressure regulating component adaptively adjusts the sealing pressure of the leather cup according to the water pressure, thereby further increasing the service life of the sealing ring.

[0016] Preferably, the pressure regulating assembly includes a telescopic rod, a slide, a telescopic ring and a flow guide, the telescopic rod is connected to the lower end of the screw, the slide is connected to the lower end of the telescopic rod, the telescopic ring is connected to the upper side of the slide, and the flow guide is connected to the outer wall of the pressure plate. When the telescopic ring moves to a specified position on the inner cavity of the positioning plate, the pressure plate pulls the telescopic ring to become an open state.

[0017] Through the above solution, the exhaust volume of the guide member by the pressure regulating component is effectively increased, thereby facilitating the removal of silt water in the faucet member and reducing dripping.

[0018] Preferably, the inner wall of the positioning plate is provided with a gradient section and a vertical section from top to bottom, the large end of the gradient section faces downward and is connected to the vertical section, and the outer wall of the slide plate is adapted to fit the vertical section.

[0019] Through the above scheme, the inclined setting of the inner wall of the gradient section causes the slide plate to squeeze the gradient section during the upward movement, thereby forcing the gradient section to undergo elastic deformation and expansion. The expanded positioning plate squeezes the sealing ring, thereby increasing the contact area between the sealing ring pressure chamber section and the valve seat, thereby realizing the compression of the pressurized chamber, and effectively increasing the pressure between the leather cup and the pressure block.

[0020] Preferably, the guide member includes a through hole, a guide plate and a perforation, the through hole is opened on the right side of the pressure plate, the guide plate is connected to the outer wall of the pressure plate, the longitudinal cross-section of the pressure plate is L-shaped, and the distance between the upper end of the pressure plate and the upper end of the valve seat gradually decreases from right to left, and the perforation is opened on the guide plate.

[0021] Through the above solution, the gap between the upper end of the pressure plate and the upper end of the valve seat gradually decreases from right to left, thereby increasing the circulation speed of the airflow and facilitating the collection of water flow.

[0022] Preferably, when the guide plate moves to a designated position on the surface of the pressure plate, the through hole is connected to the through hole, the through hole is truncated cone-shaped, and the large end of the through hole faces the telescopic rod.

[0023] With the above solution, the larger end of the through hole faces the telescopic rod, thereby converging the airflow and accelerating the flow rate of the airflow.

[0024] Preferably, the lower end surface of the inner cavity of the discharge nozzle is inclined gradually from right to left, and the right end of the lower end of the inner cavity of the discharge nozzle is lower than the upper end of the valve seat.

[0025] Through the above solution, the lower end surface of the inner cavity of the nozzle is inclined gradually from right to left, which on the one hand facilitates the discharge of water flow, and on the other hand reduces dead corners of water accumulation and avoids dripping caused by long-term accumulation of water droplets.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention solves the problem of dripping from the faucet caused by a tiny gap between the contact surface of the sealing ring and the valve body due to high water pressure. By providing a pressure regulating component, when the faucet is closed, the water pressure acts on the slide, causing the slide to move upward according to the water pressure adaptability. On the one hand, it realizes the adjustment of the pressure of the sealing ring according to the water pressure, thereby avoiding the sealing ring from being subjected to high pressure for a long time, thereby effectively improving the service life of the sealing ring. On the other hand, when the faucet is opened, the telescopic rod pushes the slide downward to close the lower side of the positioning plate, thereby reducing the dead angle when the water flows, thereby reducing the resistance when the water flows, and facilitating the discharge of the water.

[0028] 2. By setting up the guide piece, when the slide plate moves upward under the water pressure, it will push the air flow out from the through hole and flow forward along the guide plate, thereby accelerating the discharge speed of the water flow in the faucet body after the valve is closed, thereby reducing the dripping phenomenon caused by the collection and avoiding the waste of water resources. On the other hand, it reduces the dead corners of water discharge in the faucet body, thereby improving the water quality.

[0029] 3. By setting a sealing ring, the sealing ring is made of a composite of hard and soft materials at the bottom, thereby forming two soft and hard sealing modes on the valve seat to effectively improve the sealing effect. At the same time, the two materials of the sealing ring are gradually changed at the pressure changing chamber, so that when the slide plate squeezes the sealing ring and fits the valve seat, the fitting surface of the sealing ring and the valve seat is gradually from top to bottom, and then, the upper side pressurized chamber gradually applies downward pressure to the leather cup, thereby effectively improving the sealing effect to avoid dripping caused by high-pressure water seepage, thereby achieving the effect of saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0031] Figure 2 It is a cross-sectional schematic diagram of the interior of the present invention;

[0032] Figure 3 Schematic diagram of the structure of the valve seat portion of the present invention;

[0033] Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram;

[0034] Figure 5 It is a structural schematic diagram of the valve core part of the present invention;

[0035] Figure 6 This is a schematic structural diagram of the voltage regulating component of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the flow guide part of the present invention;

[0037] Figure 8 Schematic diagram of the deformation state of the sealing ring of the present invention.

[0038] In the figure: 1. water pipe; 2. faucet body; 3. discharge nozzle; 4. valve seat; 401. fixing ring; 402. groove; 403. pressure block; 5. valve core; 501. screw sleeve; 502. screw; 503. pressure plate; 504. positioning plate; 5041. gradient section; 5042. vertical section; 505. protrusion; 6. handle; 7. sealing ring; 701. leather cup; 702. pressure changing chamber; 8. pressure regulating assembly; 801. telescopic rod; 802. slide plate; 803. telescopic ring; 804. guide piece; 8041. through hole; 8042. guide plate; 8043. perforation; 9. pressurizing chamber. DETAILED DESCRIPTION

[0039] The following, in conjunction with the accompanying drawings of the embodiments of the present invention, clearly and completely describes the technical solutions of the embodiments of the present invention, making its working state and structural features more detailed. Obviously, the embodiments described are only partial embodiments of the present invention and are not complete embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making any creative ideas are all within the scope of protection of the present invention.

[0040] See also Figures 1 to 8 The present invention provides a drip-proof faucet based on a gradient sealing ring structure, and the technical solution is as follows:

[0041] For details, please refer to Figures 1 to 8 , a drip-proof faucet based on a gradient sealing ring structure is applied to a water pipe 1 and includes a faucet body 2, a discharge nozzle 3, a valve seat 4, a valve core 5, a handle 6, a sealing ring 7 and a pressure regulating assembly 8. The faucet body 2 is connected to the upper end of the water pipe 1 through a thread, and a water tape is wrapped around the connection end between the faucet and the water pipe 1 to improve the sealing effect. The discharge nozzle 3 is connected to the left side of the faucet body 2, and the discharge nozzle 3 and the faucet body 2 are integrated. The valve seat 4 is fixedly connected to the lower side of the inner cavity of the faucet body 2, the valve core 5 is connected to the upper side of the inner cavity of the faucet body 2, the handle 6 is connected to the upper end of the valve core 5, and the sealing ring 7 is set. Connected to the lower side of the outer wall of the valve core 5, the outer wall of the sealing ring 7 is connected with a leather cup 701, and the pressure regulating assembly 8 is connected to the valve core 5. When the valve core 5 is in contact with the valve seat 4, the leather cup 701 divides the gap between the sealing ring 7 and the valve seat 4 into two upper and lower pressurized chambers 9. When the water pressure reaches a specified level, the pressure regulating assembly 8 moves up to squeeze the sealing ring 7. When the sealing ring 7 is under pressure, the upper pressurized chamber 9 increases the contact pressure between the leather cup 701 and the valve seat 4, and the contact pressure between the leather cup 701 and the valve seat 4 is proportional to the water pressure. When the water pressure drops, the pressure regulating assembly 8 moves down to reduce the contact pressure between the leather cup 701 and the sealing ring 7.

[0042] By setting up a pressure-regulating component 8, the pressure-regulating component 8 will dynamically adjust the contact pressure between the sealing ring 7 and the valve seat 4 according to the water pressure. When the water flow is high pressure, the pressure-regulating component 8 squeezes the sealing ring 7 through the valve core 5, so that the sealing ring 7 fits tightly on the inner wall of the valve seat 4, thereby improving the sealing effect. When the water flow pressure is low, the pressure-regulating component 8 reduces the pressure of the sealing ring 7 on the inner wall of the valve seat 4, so that the pressure of the sealing ring 7 can be released, effectively improving the service life of the sealing ring 7.

[0043] As an embodiment of the present invention, refer to Figure 3 、 Figure 4 and Figure 8 , the valve seat 4 includes a fixing ring 401, a groove 402 and a pressure block 403. The fixing ring 401 is connected to the lower side of the inner cavity of the faucet body 2. The longitudinal section of the fixing ring 401 is stepped. The groove 402 is opened on the transverse surface of the stepped surface of the fixing ring 401. The groove 402 is arc-shaped. The pressure block 403 is connected to the inner wall of the fixing ring 401. When the valve core 5 is fitted with the fixing ring 401, the leather cup 701 is fitted with the upper end of the pressure block 403, and then a sealing surface is formed between the leather cup 701 and the pressure block 403. A variable pressure cavity 702 is opened inside the sealing ring 7. The sealing ring 7 is made of a whole piece of injection molding and is hot-melt connected at the end face. The outer peripheral surface of the sealing ring 7 is inclined. The fixing ring 401 is stepped. The vertical section 5042 of the surface is inclined, and when the valve core 5 is fitted with the fixing ring 401, the gap between the outer periphery of the sealing ring 7 and the inner wall of the fixing ring 401 gradually increases from top to bottom, thereby reducing the contact area between the sealing ring 7 and the valve seat 4, increasing the contact pressure between the sealing ring 7 and the valve seat 4, and improving the sealing state of the sealing ring 7 under high-pressure water flow conditions. The sealing ring 7 is made of a composite of two rubber materials, a hard lower part and a soft upper part, and the two materials change gradiently at the pressure-changing chamber 702. The lower side of the sealing ring 7 is polytetrafluoroethylene, and the upper side of the sealing ring 7 is natural rubber. The upper end diameter of the sealing ring 7 is greater than the diameter of the upper end of the inner wall of the fixing ring 401, and then the upper end of the sealing ring 7 is interference fit with the upper end of the inner wall of the fixing ring 401;

[0044] By setting the sealing ring 7, the lower side of the sealing ring 7 has a higher hardness. When the sealing ring 7 moves downward and contacts the flat surface of the stepped surface of the valve seat 4, a hard seal can be formed by pressure, thereby forming a sealing surface. In the process of the sealing ring 7 moving downward, the upper end of the sealing ring 7 that is interference fit with the inner wall of the fixing ring 401 is deformed and tightly fits on the vertical surface of the valve seat 4 to form a soft seal, thereby forming a sealing surface again, thereby improving the sealing effect.

[0045] As an embodiment of the present invention, refer to Figure 5 、 Figure 6 and Figure 8The valve core 5 includes a screw sleeve 501, a screw 502, a pressure plate 503, a positioning plate 504 and a protrusion 505. The screw sleeve 501 is connected to the upper end of the inner cavity of the faucet body 2, the screw sleeve 501 is slidably connected to the upper end of the faucet body 2, the screw 502 is connected to the inner wall of the screw sleeve 501, and the screw 502 is threadedly connected to the screw sleeve 501. The fixed pressure plate 503 is connected to the lower side of the screw 502, the positioning plate 504 is fixedly connected to the lower side of the pressure plate 503, the protrusion 505 is connected to the lower end of the positioning plate 504, and the protrusion 505 is connected to the concave The shape of the groove 402 matches the shape of the pressure regulating assembly 8, which includes a telescopic rod 801, a slide plate 802, a telescopic ring 803 and a flow guide 804. The telescopic rod 801 is connected to the lower end of the screw rod 502. A spring is wound around the outer wall of the telescopic rod 801. The slide plate 802 is connected to the lower end of the telescopic rod 801. When the water pressure on the lower end surface of the slide plate 802 does not reach the specified value, the telescopic rod 801 pushes the lower end surface of the slide plate 802 to keep it flush with the lower end surface of the positioning plate 504. Then, when the faucet is in the open state, the telescopic rod 801 will push The movable slide 802 moves downward, so that the lower end surface of the slide 802 is kept flush with the lower end surface of the positioning plate 504, thereby preventing water from entering the inner cavity of the positioning plate 504 and reducing the dead angle of water flow. The telescopic ring 803 is connected to the upper side of the slide 802, and the guide member 804 is connected to the outer wall of the pressure plate 503. When the telescopic ring 803 moves to a specified position in the inner cavity of the positioning plate 504, the pressure plate 503 pulls the telescopic ring 803 to open. The positioning plate 504 has magnetism and then moves to a specified height on the telescopic ring 803. When the pressure is too high, the positioning plate 504 can attract the telescopic ring 803 to move upward, occupying the space in the inner cavity of the pressure plate 503 and the positioning plate 504, thereby increasing the discharge of airflow from the guide member 804. At the same time, the magnetic positioning plate 504 can attract iron impurities in the water flow, thereby improving the water quality. The inner wall of the positioning plate 504 is provided with a gradient section 5041 and a vertical section 5042 from top to bottom. The larger end of the gradient section 5041 faces downward and is connected to the vertical section 5042. The outer wall of the slide plate 802 fits well with the vertical section 5042.

[0046] By setting the pressure regulating component 8, when the faucet is in the closed state, the pressure of the water flow acts on the lower side of the slide plate 802 and adjusts its position on the gradient section 5041 according to the size of the water flow pressure. When the water flow pressure is large, the slide plate 802 moves up in the gradient section 5041, causing the positioning block to expand. The expanded positioning plate 504 pushes the sealing ring 7 to expand, thereby increasing the pressure of the sealing ring 7 on the valve seat 4, so as to improve the sealing effect of the sealing ring 7 and the valve seat 4 under the high-pressure state. When the water flow pressure decreases, the slide plate 802 moves downward appropriately under the action of the telescopic rod 801, thereby reducing the expansion amplitude of the positioning plate 504, thereby reducing the pressure between the sealing ring 7 and the valve seat 4. At the same time, when the positioning plate 504 expands, the protrusion 505 on the lower side of the positioning plate 504 fits into the groove 402, thereby pressurizing the pressure between the lower end of the positioning plate 504 and the valve seat 4, thereby further improving the sealing effect and avoiding dripping.

[0047] As an embodiment of the present invention, refer to Figure 7 and Figure 8 The guide member 804 includes a through hole 8041, a guide plate 8042 and a perforation 8043. The through hole 8041 is opened on the right side of the pressure plate 503. The through hole 8041 passes through the pressure plate 503. The guide plate 8042 is slidably connected to the outer wall of the pressure plate 503. The guide plate 8042 slides up and down on the surface of the pressure plate 503. The longitudinal cross-section of the pressure plate 503 is L-shaped, and the distance between the upper end of the pressure plate 503 and the upper end of the valve seat 4 gradually decreases from right to left, thereby increasing the speed of the airflow when flowing between the pressure plate 503 and the valve seat 4, thereby facilitating the collection of residual water. The perforation 8043 is opened on the guide plate 8042. The guide plate 8042 is slidably connected to the outer wall of the pressure plate 503. The guide plate 8042 slides up and down on the surface of the pressure plate 503. The longitudinal cross-section of the pressure plate 503 is L-shaped, and the distance between the upper end of the pressure plate 503 and the upper end of the valve seat 4 gradually decreases from right to left, thereby increasing the speed of the airflow when flowing between the pressure plate 503 and the valve seat 4, thereby facilitating the collection of residual water. When 042 moves to the specified position on the surface of the pressure plate 503, the perforation 8043 is connected with the through hole 8041. A vent is provided on the screw 502, and the through hole 8041 is opened to the upper end of the handle 6. When the handle 6 is held to turn on the faucet, the palm of the hand will cover the vent, and then the vent is closed from the outside. The through hole 8041 is frustum-shaped, and the larger end of the through hole 8041 faces the telescopic rod 801, and then when exhausting, the discharge of airflow can be accelerated. The lower end surface of the inner cavity of the discharge nozzle 3 is inclined gradually from right to left, and the right side of the lower end of the inner cavity of the discharge nozzle 3 is lower than the upper end of the valve seat 4, which facilitates the collection of water flow.

[0048] By setting the guide member 804, when the valve is closed, the pressure generated by the water flow will cause the slide plate 802 to move up to the vertical section 5042, thereby compressing the gas in the inner cavity of the pressure plate 503 and the positioning plate 504. At this time, the palm of the hand covers the vent, and the air flow cannot be discharged from the vent. When the guide plate 8042 follows the pressure plate 503 to move down and contact the upper end of the valve seat 4, the lower end of the guide plate 8042 will be limited by the valve seat 4, and then the guide plate 8042 will slide on the surface of the pressure plate 503, so that the through hole 8041 is connected with the perforation 8043, and the pressurized air flow is discharged from the through hole 8041 and the perforation 8043 and flows along the guide plate 8042, thereby accelerating the collection of residual water.

[0049] Since multiple faucets are arranged on the same waterway when the waterways are arranged, when the faucets are all in the closed state, the pressure of the high-pressure water on the faucets is the greatest. When a faucet is opened, the opened faucet can release the pressure, and then the pressure of the faucet in the closed state is reduced. The present invention realizes dynamic adjustment of the pressure between the sealing ring 7 and the valve seat 4 according to the pressure of the water flow by providing a pressure-regulating component 8. When the water flow is in a high-pressure state, the water flow will increase the contact pressure between the sealing ring 7 and the valve seat 4 through the pressure-regulating component 8, thereby improving the sealing effect. When water is released from other connected waterways, the pressure of the water flow on the faucets in the closed state is reduced. At this time, the pressure-regulating component 8 will reduce the contact pressure between the sealing ring 7 and the valve seat 4, and then release the pressure on the sealing ring 7, thereby increasing the service life of the sealing ring 7. The specific solution is as follows;

[0050] To close the faucet: Turn the handle 6, which drives the screw 502 to rotate. The screw 502 is threadedly connected to the sleeve 501, and then the screw 502 moves downward. The downward movement of the screw 502 drives the pressure plate 503, the positioning plate 504 and the sealing ring 7 to move downward. When the positioning plate 504 moves down to the specified position, the protrusion 505 fits with the groove 402 to achieve the first seal. In the process of the positioning plate 504 moving down, the side wall of the sealing ring 7 close to the upper side will contact the valve seat 4 to form a second seal. When the positioning plate 504 moves down to the specified position, the lower wall of the sealing ring 7 fits with the fixing ring 401 to form a third seal. At the same time, the leather cup 701 contacts the pressure block 403 to form a fourth sealing surface. Through the four sealing surfaces, the sealing effect is effectively improved and the dripping of high-pressure water flow is reduced.

[0051] When the faucets are all in the closed state, the water flow is in a high-pressure state for the faucets, and the pressure of the water flow will act on the slide plate 802, causing the slide plate 802 to move upward. When the slide plate 802 moves up to the specified position, it will squeeze the gradient section 5041, thereby causing the positioning plate 504 to expand outward. The expanded positioning plate 504 will push the sealing ring 7 to open. Since the sealing ring 7 is made of a composite of two rubber materials, the lower hard and the upper soft, the upper side of the sealing ring 7 is relatively soft. When the sealing ring 7 opens, the sealing ring 7 will gradually fit with the valve seat 4 from top to bottom, causing the volume of the upper pressure chamber 9 to decrease and the pressure to increase. When the pressure of the upper pressure chamber 9 acts on the leather cup 701, the contact pressure between the leather cup 701 and the pressure block 403 will be increased, thereby improving the sealing effect.

[0052] When some faucets are in the open state, the pressure of the faucets in the closed state is reduced, and the telescopic rod 801 pushes the slide plate 802 downward. The downward movement of the slide plate 802 reduces the pressure on the positioning plate 504. The positioning plate 504 contracts and reduces the pressure on the sealing ring 7, so that the pressure on the sealing ring 7 can be released, effectively extending the service life of the sealing ring 7.

[0053] When the faucet is turned on, the handle 6 is rotated in the opposite direction, and the handle 6 drives the screw 502 to rotate, so that the screw 502 moves upward, and the upward movement of the screw 502 drives the pressure plate 503, the positioning plate 504 and the sealing ring 7 to move upward, and then a gap appears between the valve core 5 and the valve seat 4, and the water flows out from the gap. At this time, the pressure of the water flow on the slide 802 is greatly reduced, and then the telescopic rod 801 pushes the slide 802 downward so that the lower end surface of the slide 802 is flush with the lower end surface of the positioning plate 504, thereby reducing the dead angle of water flow and facilitating the discharge of water.

[0054] In order to reduce the phenomenon that the water in the faucet body 2 and the discharge nozzle 3 is gathered for a long time after the faucet is closed, a guide component is provided. When the faucet is closed, the guide member 804 guides the airflow to pass through the faucet body 2 and the discharge nozzle 3, so that the residual water flows out along the discharge water flow. Specifically, by providing the vertical section 5042, when the faucet is closed, the slide plate 802 is at the vertical section 5042. At this time, the resistance to the upward movement of the slide plate 802 is small, and the reduced water pressure will push the slide plate 802 to move up to the gradient section 5041. The upward movement of the slide plate 802 will reduce the volume of the inner cavity of the pressure plate 503 and the positioning plate 504, so that the airflow is discharged along the through hole 8041 and the perforation 8043. The airflow flows from back to front along the guide plate 8042, thereby accelerating the gathering of the water flow, so that the water flow can be discharged synchronously with the discharge water flow when the faucet is closed.

[0055] Although the embodiments of the present invention have been described, it is possible for those skilled in the art to change and modify the embodiments to obtain other effects with an understanding of the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drip-proof faucet based on a gradient sealing ring structure, applied to a water pipe (1), characterized by: The invention comprises a faucet body (2), a discharge nozzle (3), a valve seat (4), a valve core (5), a handle (6), a sealing ring (7) and a pressure regulating assembly (8), wherein the faucet body (2) is connected to the upper end of the water pipe (1), the discharge nozzle (3) is connected to the left side of the faucet body (2), the valve seat (4) is connected to the lower side of the inner cavity of the faucet body (2), the valve core (5) is connected to the upper side of the inner cavity of the faucet body (2), the handle (6) is connected to the upper end of the valve core (5), the sealing ring (7) is sleeved on the lower side of the outer wall of the valve core (5), the outer wall of the sealing ring (7) is connected to a leather cup (701), and the pressure regulating assembly (8) is provided. The component (8) is connected to the valve core (5). When the valve core (5) and the valve seat (4) are in contact, the leather cup (701) separates the gap between the sealing ring (7) and the valve seat (4) into two upper and lower pressurized chambers (9). When the water pressure reaches a specified level, the pressure regulating component (8) moves upward to squeeze the sealing ring (7). When the sealing ring (7) is pressurized, the upper pressurized chamber (9) increases the contact pressure between the leather cup (701) and the valve seat (4), and the contact pressure between the leather cup (701) and the valve seat (4) is proportional to the water pressure. When the water pressure drops, the pressure regulating component (8) moves downward to reduce the contact pressure between the leather cup (701) and the sealing ring (7).

2. The anti-drip faucet based on the gradient sealing ring structure according to claim 1, characterized in that: The valve seat (4) comprises a fixing ring (401), a groove (402) and a pressure block (403); the fixing ring (401) is connected to the lower side of the inner cavity of the faucet body (2); the longitudinal cross-section of the fixing ring (401) is stepped; the groove (402) is provided on the fixing ring (401); the pressure block (403) is connected to the inner wall of the fixing ring (401); when the valve core (5) is in contact with the fixing ring (401), the leather cup (701) is in contact with the upper end of the pressure block (403).

3. The anti-drip faucet based on the gradient sealing ring structure according to claim 2, characterized in that: A pressure-changing chamber (702) is provided inside the sealing ring (7). The outer peripheral surface of the sealing ring (7) is inclined. When the valve core (5) and the fixing ring (401) are in contact, the gap between the outer periphery of the sealing ring (7) and the inner wall of the fixing ring (401) gradually increases from top to bottom. The sealing ring (7) is made of a composite of two rubber materials, one hard at the bottom and one soft at the top, and the two materials change in a gradient at the pressure-changing chamber (702).

4. The anti-drip faucet based on the gradient sealing ring structure according to claim 3, characterized in that: The valve core (5) comprises a screw sleeve (501), a screw rod (502), a pressure plate (503), a positioning plate (504) and a projection (505), wherein the screw sleeve (501) is connected to the upper side of the inner cavity of the faucet body (2), the screw rod (502) is connected to the inner wall of the screw sleeve (501), and the screw rod (502) and the screw sleeve (501) are threadedly connected, the pressure plate (503) is connected to the lower side of the screw rod (502), the positioning plate (504) is connected to the lower side of the pressure plate (503), and the projection (505) is connected to the lower end of the positioning plate (504), and the projection (505) matches the shape of the groove (402).

5. The anti-drip faucet based on the gradient sealing ring structure according to claim 4, characterized in that: The pressure regulating assembly (8) comprises a telescopic rod (801), a slide plate (802), a telescopic ring (803) and a flow guide (804); the telescopic rod (801) is connected to the lower end of the screw rod (502); the slide plate (802) is connected to the lower end of the telescopic rod (801); the telescopic ring (803) is connected to the upper side of the slide plate (802); and the flow guide (804) is connected to the outer wall of the pressing plate (503); when the telescopic ring (803) moves to a specified position on the inner cavity of the positioning plate (504), the pressing plate (503) pulls the telescopic ring (803) to transform into an open state.

6. The anti-drip faucet based on the gradient sealing ring structure according to claim 5, characterized in that: The inner wall of the positioning plate (504) is provided with a gradient section (5041) and a vertical section (5042) from top to bottom, the large end of the gradient section (5041) faces downward and is connected to the vertical section (5042), and the outer wall of the slide plate (802) is adapted to fit the vertical section (5042).

7. The anti-drip faucet based on the gradient sealing ring structure according to claim 6, characterized in that: The guide member (804) includes a through hole (8041), a guide plate (8042) and a perforation (8043), wherein the through hole (8041) is provided on the right side of the pressure plate (503), and the guide plate (8042) is connected to the outer wall of the pressure plate (503). The longitudinal cross-section of the pressure plate (503) is L-shaped, and the distance between the upper end of the pressure plate (503) and the upper end of the valve seat (4) gradually decreases from right to left, and the perforation (8043) is provided on the guide plate (8042).

8. The anti-drip faucet based on the gradient sealing ring structure according to claim 7, characterized in that: When the guide plate (8042) moves to a specified position on the surface of the pressure plate (503), the through hole (8043) is connected to the through hole (8041), and the through hole (8041) is truncated cone-shaped, with the large end of the through hole (8041) facing the telescopic rod (801).

9. The anti-drip faucet based on the gradient sealing ring structure according to claim 7, characterized in that: The lower end surface of the inner cavity of the discharge nozzle (3) is inclined gradually downward from right to left, and the right end of the lower end of the inner cavity of the discharge nozzle (3) is lower than the upper end of the valve seat (4).

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