Drip-proof faucet for pipeline direct drinking water

Abstract

The invention relates to the technical field of water dropping prevention of faucets, in particular to a water dropping prevention faucet for pipeline direct drinking water, which comprises a faucet consisting of a water inlet pipe and a water outlet pipe, a knob is rotatably arranged at the upper end of the water inlet pipe, and a water separation disc and a water retaining disc positioned at the lower end of the water outlet pipe are arranged in the water inlet pipe; a valve is arranged between the water separation disc and the water retaining disc, and an anti-dripping device located at the upper end of the water separation disc is arranged on the rotary knob; the anti-dripping device comprises a lower column casing embedded into the upper end of the water separation disc, an upper column casing penetrates through the rotating ring, the notch of the water blocking plug and the water inlet hole only have two states of complete staggering (closing) and complete overlapping (opening), no middle adjusting position exists, the knob and the rotating handle are directly connected to be matched with a double-bead repulsion mechanism of the anti-dripping device, and the anti-dripping device is convenient to adjust. The knob is ensured not to stay at the middle angle, so that the valve cannot be partially opened, the possibility of small-flow water dripping is fundamentally avoided, and the requirements of pipeline direct drinking water on leakage prevention and accurate metering are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of faucet anti-dripping, in particular to a pipeline direct drinking water anti-dripping faucet. BACKGROUND

[0002] With the improvement of residents' health consciousness and the increase of high-quality life demand, in recent years, the community pipeline direct drinking water system as the core carrier of terminal water purification service has achieved rapid popularization in the country, and the installation and use of user terminal water purification faucets have increased explosively. As high-quality drinking water after deep purification, the production, transportation and operation and maintenance cost of pipeline direct drinking water is significantly higher than that of ordinary tap water. According to industry statistics, the unit price of ordinary tap water usually maintains at about 3.00 yuan / ton, while the average unit price of pipeline direct drinking water is as high as 300.00 yuan / ton due to the need for multi-stage filtration (such as RO reverse osmosis, activated carbon adsorption, ultraviolet sterilization, etc.), closed pipe network transportation and regular water quality monitoring, and the price difference is as high as 100 times. The cost and pricing logic determines the importance of accurate metering and reducing loss to water service operation enterprises.

[0003] However, the current mainstream terminal faucet of pipeline direct drinking water follows the valve design logic of traditional water heating and bathroom products, and the cooperation gap between the valve core and the valve seat can be adjusted manually by the user to achieve a small flow dripping state. Because the existing domestic metering water meter (including mechanical water meter and ordinary electronic water meter) has a minimum metering threshold, when the water flow is in the dripping mode, the water flow cannot drive the water meter internal impeller to rotate or trigger the electronic sensing element, resulting in that the water meter cannot be normally metered.

[0004] For example, a kind of anti-dripping faucet with the application number CN202211539816.2 relates to the technical field of faucet, the prior art includes faucet pipe;The valve body is fixedly connected to the outside of the faucet pipe;By setting a first plugging block, the second plugging block is driven to plug the internal passage of the valve body at the same time by screwing down the threaded rod, which plays a role in sealing the water flow after the water valve is closed. The water dripping condition is reduced by using a first elastic element to extrude a sealing ring tightly attached to the inner wall of the valve body. When the threaded rod is damaged and the water valve cannot be closed, the hand presses the pressing plate, which drives the third plugging block to plug the internal passage of the valve body, thereby playing the role of emergency closing of the water valve. The limiting rod penetrates the fixed block and inserts into the internal limiting of the pressing plate, thereby playing the role of limiting the pressing plate. The filter screen is installed between the connecting pipe and the valve body, thereby playing the role of filtering the water quality in the connecting pipe.

[0005] However, the above-mentioned prior art still has some defects when it comes to faucet anti-dripping: The prior art forms a basic water valve frame by fixedly connecting the faucet pipe and the valve body, and installs and connects the connecting pipe through the threaded plate and the sealing sleeve of the assembly screw at the other end of the valve body, so as to build a complete water conveying path from the water inlet of the connecting pipe to the valve body to the water outlet of the faucet pipe. After the water enters the connecting pipe, it can flow out from the bottom end of the faucet pipe only through the internal passage of the valve body.

[0006] However, the core problem of the pipeline direct drinking water scene is that the user actively adjusts the valve to make the water flow in a dripping state to evade the water meter metering, which belongs to the active control type dripping. The above-mentioned technology does not limit the fine adjustment operation, and the user can make the water flow in a small flow dripping state by manually adjusting the cooperation gap between the valve core and the valve seat of the valve. However, the existing civil metering water meter (mechanical water meter or ordinary electronic water meter) has a minimum metering threshold. When the water flow is in a dripping mode, the water meter impeller cannot be driven to rotate or the electronic sensing element cannot be triggered, so that the water meter cannot be normally metered.

[0007] There is no physical barrier that must be crossed during the opening process. The user can make the valve core and the valve seat form a small gap (only meet the dripping demand) by rotating the handle by a very small amplitude. For example, the disclosure indicates that the conventional water purification faucet can realize small flow dripping by fine adjustment of the valve. The above-mentioned prior art lacks a forced gap component, and cannot expand the gap to a continuous water outlet state at the initial stage of opening, so that small flow dripping is possible.

[0008] Based on this, in the light of the above-mentioned points, the existing technology still has room for improvement in the way of preventing dripping of the faucet. SUMMARY

[0009] In order to solve the above-mentioned technical problems, the present application provides a pipeline direct drinking water anti-dripping faucet, which adopts the following technical scheme: A pipeline direct drinking water anti-dripping faucet, comprising a faucet composed of a water inlet pipe and a water outlet pipe, a knob is rotatably arranged at the upper end of the water inlet pipe, a water separation disc is arranged in the water inlet pipe, the water separation disc is located at the upper end of the water outlet pipe, a water baffle is arranged in the water inlet pipe and located at the lower end of the water outlet pipe, a water inlet cavity is formed between the water separation disc and the water baffle, a valve is arranged between the water separation disc (3) and the water baffle (4), and a drip preventer is arranged on the knob and located at the upper end of the water separation disc; The drip preventer comprises a lower cylinder embedded in the upper end of the water separation disc, and a lower ball is arranged at the upper end of the lower cylinder by spring pressing; A rotating ring is arranged in the knob and located above the water separation disc, an upper cylinder is arranged on the rotating ring, and an upper ball is arranged at the lower end of the upper cylinder by spring pressing.

[0010] Preferably, the valve comprises a water inlet cylinder arranged on the water separation disc, a water inlet is arranged on the water inlet cylinder and located between the water separation disc and the water baffle, a water blocking block is arranged at the lower end of the water inlet cylinder, water inlet holes are symmetrically arranged on the water blocking block, a water blocking plug is rotatably arranged on the water blocking block, and notches corresponding to the water inlet holes are arranged on the water blocking plug; The water inlet cylinder is equipped with a rotating handle that is connected to the water-blocking plug, and the handle is connected to the knob.

[0011] Preferably, a water supply pipe is provided on the water baffle plate (4), and one end of the supply pipe is connected to the lower end of the water baffle block.

[0012] Preferably, the water inlet pipe is equipped with a water inlet valve located below the water baffle plate; The inlet valve includes a sleeve installed on the inlet pipe, one end of which extends into the inlet pipe. An arc-shaped baffle is installed inside the inlet pipe at the axis of the sleeve, with the convex surface of the arc-shaped baffle facing the baffle plate. The concave side of the arc-shaped baffle is the water inlet side, and the convex side is the water outlet side. A piston corresponding to the arc-shaped baffle is slidably installed inside the sleeve.

[0013] Preferably, a pressure-holding cavity is formed between the end of the piston away from the arc-shaped baffle and the sleeve, and a return spring located in the pressure-holding cavity is provided between one end of the piston and the sleeve.

[0014] Preferably, the piston has a connecting hole that connects the pressure-holding chamber to the water inlet side.

[0015] Preferably, a valve block is provided on one side of the sleeve, located on the outlet side, and a pressure relief chamber is provided inside the valve block. A plug is provided inside the pressure relief chamber, and the plug divides the pressure relief chamber into an inner chamber and an outer chamber. The valve block has a guide hole that connects the inner cavity and the pressure holding cavity, and a connecting hole that connects the outer cavity and the water outlet side.

[0016] Preferably, a sliding rod is slidably inserted into the pressure relief chamber, and a rubber plug corresponding to the plug is provided at one end of the sliding rod, with the rubber plug located in the outer cavity.

[0017] Preferably, the water-blocking plate has an arc-shaped groove; One end of the sliding rod slides through the baffle plate and the water separator plate and extends into the arc groove. An arc strip located in the arc groove is provided on the rotating ring, and a guide slope is provided at one end of the arc strip.

[0018] Preferably, a limit ring is provided on the sliding rod, and a retaining spring is provided between the limit ring and the valve block.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The notch of the water-blocking plug of this invention and the water inlet hole have only two states: completely offset (closed) and completely overlap (open). There is no intermediate adjustment position. The direct connection between the knob and the handle, combined with the double-bead repulsion mechanism of the anti-drip device, ensures that the knob cannot stay at the middle angle. Therefore, the valve cannot be partially opened, fundamentally eliminating the possibility of small-flow dripping. This meets the requirements of piped drinking water for anti-drip and accurate metering.

[0020] 2. In this invention, the arc-shaped strip disengages from the sliding rod, and the plug resets and seals the end cap under the action of the clamping spring. The pressure-holding chamber is replenished with water through the connecting hole until the pressure is balanced with the inlet side. The reset spring pushes the piston to press tightly against the arc-shaped baffle, forming a double seal to stop the water flow. The entire process is synchronized by the knob to switch the anti-drip device gear, open and close the valve, and release and hold the pressure of the inlet valve. The mechanical gear constraint eliminates the intermediate fine-tuning position. Combined with flow threshold control and double sealing, complete anti-drip is achieved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a three-dimensional sectional view of the present invention.

[0023] Figure 3 This is a schematic diagram of the anti-drip device of the present invention.

[0024] Figure 4 This is the present invention. Figure 3 A magnified view of part A.

[0025] Figure 5 This is a schematic diagram of the valve structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure between the water-blocking block and the water-blocking plug of the present invention.

[0027] Figure 7 This is a schematic diagram of the water inlet valve of the present invention.

[0028] Figure 8 This is the present invention. Figure 7 A magnified view of section B.

[0029] Figure 9 This is a schematic diagram of the arc-shaped baffle of the present invention.

[0030] Figure 10 This is a planar sectional view of the water inlet valve of the present invention.

[0031] Figure 11 This is a schematic diagram of the structure between the sliding rod and the arc-shaped groove of the present invention.

[0032] Figure 12 This is a schematic diagram of the structure between the rotating ring and the arc-shaped strip.

[0033] Explanation of reference numerals in the attached diagram: 1. Faucet; 11. Inlet pipe; 12. Outlet pipe; 2. Knob; 21. Cavity; 3. Water separator; 4. Water baffle; 5. Inlet chamber; 6. Valve; 61. Inlet cylinder; 62. Inlet; 63. Water block; 64. Inlet hole; 65. Water stopper; 66. Notch; 67. Handle; 68. Water pipe; 7. Anti-drip device; 71. Lower cylinder; 72. Lower ball bearing; 73. Rotating ring; 74. Upper cylinder; 75. Upper ball bearing; 8. Inlet valve; 8 1. Sleeve; 82. Arc-shaped baffle; 821. Inlet side; 822. Outlet side; 83. Piston; 831. Pressure holding chamber; 832. Return spring; 833. Connecting hole; 84. Valve block; 841. Pressure relief chamber; 85. Plug; 851. Inner cavity; 852. Guide hole; 853. Outer cavity; 854. Connecting hole; 86. Sliding rod; 861. Plug; 862. Limiting ring; 87. Arc-shaped groove; 88. Arc-shaped strip; 881. Guide slope; 89. Clamping spring. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1 to 12 This application will be described in further detail.

[0035] This application discloses an anti-drip faucet for piped drinking water. It forms an open / closed position through a double-bead mutually exclusive structure. Combined with the design of the valve notch and the water inlet hole being completely offset or overlapped, it eliminates tiny drips and accurately meets the anti-drip and metering requirements of piped drinking water.

[0036] Example 1: Reference Figure 1 and Figure 2 As shown, a drip-proof tap for direct drinking water includes a tap 1 consisting of an inlet pipe 11 and an outlet pipe 12. A knob 2 is rotatably mounted on the upper end of the inlet pipe 11. The knob 2 is cylindrical and has a cavity 21 at the bottom.

[0037] A water baffle plate 3 is installed inside the water inlet pipe 11. The water baffle plate 3 is located at the upper end of the water outlet pipe 12. A water baffle plate 4 is installed inside the water inlet pipe 11 at the lower end of the water outlet pipe 12. A water inlet chamber 5 is formed between the water baffle plate 3 and the water baffle plate 4. A valve 6 is installed between the water baffle plate 3 and the water baffle plate 4.

[0038] Rotating knob 2 can drive valve 6 to rotate through the transmission structure, adjust the overlap, and realize the flow control of water flowing from inlet pipe 11 into inlet chamber 5 and then out of outlet pipe 12. Knob 2 is equipped with anti-drip device 7 located on the upper end of water baffle plate 3. Anti-drip device 7 can prevent water from dripping due to slight opening of valve 6, ensure accurate metering, and meet the requirements of drinking water hygiene and durability.

[0039] Reference Figure 2 , Figure 3 and Figure 4As shown, specifically, the anti-drip device 7 includes a lower cylinder 71 embedded in the upper end of the water-separating plate 3. A lower ball 72 is pressed onto the upper end of the lower cylinder 71 by a spring (part of the ball protrudes from the top of the lower cylinder 71). The spring force is set to the trigger threshold to ensure that the lower ball 72 remains in the popped-out state when there is no external force. The rotatable part is integrated into the knob 2, including a rotating ring 73 located above the water-separating plate 3 in the knob 2. An upper cylinder 74 is inserted through the rotating ring 73. An upper ball 75 is pressed onto the lower end of the upper cylinder 74 by a spring (part of the ball protrudes from the bottom of the upper cylinder 74). The centers of the upper ball 75 and the lower ball 72 are on the same vertical line.

[0040] When knob 2 is in the closed state, the upper cylinder 74 is located on the side of the lower cylinder 71, the upper ball 75 and the lower ball 72 are horizontally offset, and the guide hole of valve 6 is completely closed; at this time, the upper ball 75 is pressed towards the rotating ring 73 by its own spring force, and the lower ball 72 is lifted up by its own spring force, and the two do not interfere with each other.

[0041] When the user turns knob 2 to attempt to open the valve, the upper cylinder 74 gradually approaches the lower cylinder 71. The spring repulsion of the two balls increases sharply as the distance decreases. Before reaching the critical position, the repulsion pushes the upper ball 75 to cause the rotating ring 73 to rebound in the closing direction, forming a resistance barrier and preventing knob 2 from staying in the middle position. When the applied torque overcomes the repulsion barrier, the upper ball 75 passes directly above the lower cylinder 71. At that moment, the repulsion is converted into a lateral thrust, pushing the upper cylinder 74 to slide quickly to the other side (open state). At this time, the guide hole of valve 6 is fully open, and the spring repulsion keeps the upper ball 75 stably on that side, preventing it from returning to the middle position.

[0042] When closed, rotating knob 2 in the opposite direction to the critical position causes the spring repulsive force to act again, pushing the upper ball 75 to quickly return to the closed side, completely sealing valve 6. This creates a bistable state where the valve is either completely closed or stably open (flow rate meets standards), eliminating the possibility of dripping during fine-tuning and meeting the metering requirements of piped drinking water.

[0043] Reference Figure 5 and Figure 6 As shown, specifically, valve 6 includes a water inlet cylinder 61 that passes through the water baffle 3. The water inlet cylinder 61 has a water inlet 62 located between the water baffle 3 and the water barrier 4. A water blocking block 63 is provided at the lower end of the water inlet cylinder 61. Water inlet holes 64 are symmetrically provided on the water blocking block 63. A water blocking plug 65 is rotatably provided on the water blocking block 63. A notch 66 corresponding to the water inlet hole 64 is provided on the water blocking plug 65.

[0044] A handle 67 is rotatably mounted on the water inlet cylinder 61 and connected to the water-blocking plug 65. The handle 67 is connected to the knob 2. A water supply pipe 68 is threaded through the water baffle plate 4. One end of the water supply pipe 68 is connected to the lower end of the water-blocking block 63.

[0045] When the anti-drip device 7 is in the closed state (the upper ball 75 is located on the side of the lower ball 72), the knob 2 drives the handle 67 and the water-blocking plug 65 to rotate until the notch 66 and the water inlet 64 are completely misaligned. The side wall of the water-blocking plug 65 seals the water inlet 64. Although the water in the water inlet pipe 11 can flow through the water inlet cylinder 61 to the water inlet 62, it is blocked by the water-blocking plug 65 and cannot enter the water supply pipe 68, thus achieving complete flow interruption.

[0046] When the user applies sufficient torque to turn the knob 2, the upper ball 75 of the anti-drip device 7 overcomes the repulsive force and slides to the other side of the lower ball 72 (open state). The knob 2 directly drives the handle 67 to rotate, and the water-blocking plug 65 rotates synchronously so that the notch 66 and the water inlet 64 are completely aligned. At this time, the water inlet 62, the water inlet 64, the notch 66 and the water pipe 68 form a smooth channel. The water flows through the water inlet chamber 5 and is discharged from the water outlet pipe 12. Because of the matching of the notch 66 and the water inlet 64, the flow rate meets the water meter's measurement threshold.

[0047] The notch 66 of the water-blocking plug 65 and the water inlet hole 64 can only be in two states: completely offset (closed) and completely overlapped (open). There is no intermediate adjustment position. The direct connection between the knob 2 and the handle 67, together with the double-bead repulsion mechanism of the anti-drip device 7, ensures that the knob 2 cannot stay at the middle angle. Therefore, the valve 6 cannot be partially opened, fundamentally eliminating the possibility of small-flow dripping. This meets the requirements of piped drinking water for anti-drip and accurate metering.

[0048] Example 2: Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, based on Embodiment 1, an inlet valve 8 is installed on the inlet pipe 11 below the baffle plate 4; the inlet valve 8 is linked with the knob 2 through a pressure holding and pressure relief mechanism. Under normal conditions, the piston 83 blocks the water flow by means of water pressure balance and spring force. When it is open, the knob 2 drives the component to release the pressure in the pressure holding chamber 831, and the piston 83 moves to conduct the water flow (the flow rate reaches the standard); when it is closed, it resets and blocks, with only two states, closed or open, to prevent intermediate flow and ensure drip prevention and metering.

[0049] Specifically, the water inlet valve 8 includes a sleeve 81 installed on the water inlet pipe 11. One end of the sleeve 81 extends through to the inner axis of the water inlet pipe 11. An arc-shaped baffle 82 is installed inside the water inlet pipe 11, located at the axis of the sleeve 81. The convex surface of the arc-shaped baffle 82 faces the water baffle plate 4. The concave surface of the arc-shaped baffle 82 is the water inlet side 821, and the convex surface of the arc-shaped baffle 82 is the water outlet side 822. The arc-shaped baffle 82 separates the water inlet side 821 (concave surface) and the water outlet side 822 (convex surface).

[0050] A piston 83 corresponding to the arc-shaped baffle 82 is slidably disposed inside the sleeve 81. The end of the piston 83 away from the arc-shaped baffle 82 forms a pressure-holding cavity 831 between the sleeves 81. A connecting hole 833 is provided on the piston 83 to connect the pressure-holding cavity 831 with the water inlet side 821.

[0051] Under normal conditions, water flows from the inlet side 821 into the pressure holding chamber 831 through the connecting hole 833 between the pressure holding chamber 831 and the inlet side 821, thus balancing the water pressure in the pressure holding chamber 831 and the inlet side 821. The return spring 832, which is set between one end of the piston 83 and the sleeve 81, pushes the piston 83 to press tightly against the arc-shaped baffle 82, blocking the water flow. The return spring 832 is located inside the pressure holding chamber 831.

[0052] A valve block 84 located on the outlet side 822 is provided on one side of the sleeve 81. A pressure relief chamber 841 is provided inside the valve block 841. A plug 85 is provided inside the pressure relief chamber 841 (the plug 85 is a ring structure with a protrusion in the middle). The plug 85 divides the pressure relief chamber 841 into an inner cavity 851 and an outer cavity 853. A guide hole 852 is provided on the valve block 84 to connect the inner cavity 851 and the pressure holding chamber 831. A connecting hole 854 is provided on the valve block 84 to connect the outer cavity 853 and the outlet side 822.

[0053] A sliding rod 86 is slidably inserted into the pressure relief chamber 841. A limit ring 862 is provided on the sliding rod 86. A rubber plug 861 corresponding to the plug 85 is provided at one end of the sliding rod 86. The rubber plug 861 is located in the outer cavity 853. An arc-shaped groove 87 is provided on the water baffle 3. One end of the sliding rod 86 slides through the water baffle 4 and the water baffle 3 and extends into the arc-shaped groove 87. An arc-shaped strip 88 located in the arc-shaped groove 87 is provided on the rotating ring 73. A guide slope 881 is provided at one end of the arc-shaped strip 88.

[0054] When closed, water pressure in the pressure-holding chamber 831 flows through the guide hole 852 to the inner cavity 851. The piston 861, under water pressure, presses tightly against the plug 85, stabilizing the pressure in the pressure-holding chamber 831, and the piston 83 blocks the water flow. When the knob 2 is turned to open, the arc-shaped strip 88 rotates with the rotating ring 73, passing over the sliding rod 86. The retaining spring 89, located between the limiting ring 862 and the valve block 84, pushes the limiting ring 862, causing the piston 861 to move away from the plug 85. Water in the pressure-holding chamber 831 flows through the guide hole 852... The middle protrusion of the plug 85 releases pressure in the gap between the plug and the outer cavity 853. The water pressure on the inlet side 821 pushes the piston 83 to compress the return spring 832. The water flows from the inlet side 821 through the gap between the baffle and the piston 83 into the outer cavity 853, and enters the outlet side 822 through the connecting hole 854. At this time, the water pressure in the pressure holding chamber 831 is released, and the water flow on the inlet side 821 will push the piston 83 to compress the spring, so that the water flow between the inlet side 821 and the outlet side 822 can pass smoothly.

[0055] When closed, the guide slope 881 of the arc-shaped bar 88 pushes the sliding rod 86, the limit ring 862 compresses the clamping spring 89, the plug 861 re-seals the plug 85, and the water inlet 821 flows into the pressure holding chamber 831 through the connecting hole 833. After the pressure is balanced, the reset spring 832 pushes the piston 83 to reset and seal, thus achieving complete flow interruption.

[0056] In detail, in the initial state, knob 2 is in the closed position, upper ball 75 and lower ball 72 are horizontally offset and do not contact each other, knob 2 is constrained by the initial positioning and cannot be finely adjusted, the notch 66 of the water-blocking plug 65 of valve 6 is completely offset from the water inlet hole 64, blocking the water flow channel; under the combined action of the return spring 832 and the pressure-holding chamber 831 (which is balanced with the water pressure on the water inlet side 821), the piston 83 of the water inlet valve 8 is pressed tightly against the arc-shaped baffle 82, and the plug 861 is pressed tightly against the plug 85 by the water pressure to keep the pressure in the pressure-holding chamber 831 stable, forming a double seal.

[0057] When the knob 2 is turned with applied torque, the rotating ring 73 drives the upper cylinder 74 to approach the lower cylinder 71. The upper ball 75 and the lower ball 72 form a resistance barrier due to the repulsive force of the same-pole spring. After the torque exceeds the threshold, the upper ball 75 overcomes the repulsive force and slides to the other side of the lower cylinder 71 and locks into the open position. At the same time, the knob 2 drives the water-blocking plug 65 to rotate through the handle 67, so that the notch 66 and the water inlet hole 64 are completely aligned, opening the valve 6 channel. The arc strip 88 on the rotating ring 73 pushes the sliding rod 86, so that the rubber plug 861 moves away from the plug 85, the pressure chamber 831 is depressurized, and the water pressure on the water inlet side 821 pushes the piston 83 to compress the return spring 832, forming a water passage gap. The water flows through the water inlet pipe 11, the water inlet side 821, the annular gap, the water outlet side 822, the water baffle 4, the water blocking block 63, and the water delivery pipe 68 to the water outlet pipe 12. At this time, the flow rate of the water passage section meets the metering requirements.

[0058] When closed, the knob 2 is rotated in the opposite direction, and the upper ball 75 quickly returns to the initial side under the repulsive force of the spring. The upper ball 75 and the lower ball 72 lock the closed position. The water-blocking plug 65 rotates in the opposite direction to completely displace the notch 66 from the water inlet hole 64, closing the valve 6 channel. The arc-shaped strip 88 disengages from the sliding rod 86, and the plug 861 returns to the sealing plug 85 under the action of the pressing spring 89. The pressure-holding chamber 831 is replenished with water through the connecting hole 833 until the pressure is balanced with the water inlet side 821. The reset spring 832 pushes the piston 83 to press tightly against the arc-shaped baffle 82, forming a double seal to stop the water flow. The whole process is synchronized by the knob 2 to switch the anti-drip device 7 gear, open and close the valve 6, and release and hold the pressure of the water inlet valve 8. The mechanical gear constraint eliminates the intermediate fine adjustment position. Combined with the flow threshold control and double sealing, complete anti-drip is achieved.

[0059] The implementation principle of this invention is as follows: Step 1: When knob 2 is in the closed state, the upper cylinder 74 is located on the side of the lower cylinder 71, the upper ball 75 and the lower ball 72 are horizontally offset, and the guide hole of valve 6 is completely closed; at this time, the upper ball 75 is pressed towards the rotating ring 73 by its own spring force, and the lower ball 72 is lifted up by its own spring force, and the two do not interfere with each other.

[0060] Step 2: When the user turns knob 2 to try to open it, the upper cylinder 74 gradually approaches the lower cylinder 71, and the spring repulsion of the two balls increases sharply as the distance decreases: before reaching the critical position, the repulsion pushes the upper ball 75 to drive the rotating ring 73 to rebound in the closing direction, forming a "resistance barrier" to prevent knob 2 from staying in the middle position; when the applied torque overcomes the repulsion barrier, the upper ball 75 passes directly above the lower cylinder 71, and the repulsion is converted into a lateral thrust, pushing the upper cylinder 74 to slide quickly to the other side (open state). At this time, the guide hole of valve 6 is fully opened, and the spring repulsion keeps the upper ball 75 stably on this side, unable to return to the middle position.

[0061] Step 3: When closing, rotate knob 2 in the opposite direction to the critical position. The spring repulsive force will then exert its effect, pushing the upper ball 75 to quickly return to the closed side, and valve 6 will be completely closed. This bistable state, where the valve is either completely closed or stably open (flow rate meets the standard), eliminates the possibility of dripping during fine-tuning, thus meeting the metering requirements of piped drinking water.

[0062] Step 4: In the closed state (upper ball 75 is located on the side of lower ball 72), the knob 2 drives the handle 67 and the water-blocking plug 65 to rotate until the notch 66 and the water inlet 64 are completely misaligned. The side wall of the water-blocking plug 65 seals the water inlet 64. Although the water in the water inlet pipe 11 can flow through the water inlet cylinder 61 to the water inlet 62, it is blocked by the water-blocking plug 65 and cannot enter the water supply pipe 68, thus achieving complete flow interruption.

[0063] Step 5: When the user applies sufficient torque to turn knob 2, the upper ball 75 of the anti-drip device 7 overcomes the repulsive force and slides to the other side of the lower ball 72 (open state). Knob 2 directly drives the handle 67 to rotate, and the water-blocking plug 65 rotates synchronously so that the notch 66 and the water inlet 64 are completely aligned. At this time, the water inlet 62, the water inlet 64, the notch 66 and the water pipe 68 form a smooth channel. The water flows through the water inlet chamber 5 and is discharged from the water outlet pipe 12. Because of the matching of the notch 66 and the water inlet 64, the flow rate meets the water meter's measurement threshold.

[0064] Step Six: In the initial state, knob 2 is in the closed position, upper ball 75 and lower ball 72 are horizontally offset and do not contact each other, knob 2 is constrained by the initial positioning and cannot be finely adjusted, the notch 66 of the water-blocking plug 65 of valve 6 is completely offset from the water inlet 64, blocking the water flow channel; under the combined action of the return spring 832 and the pressure-holding chamber 831 (which is balanced with the water pressure on the water inlet side 821), the piston 83 of the water inlet valve 8 is pressed tightly against the arc-shaped baffle 82, and the plug 861 is pressed tightly against the plug 85 by the water pressure to keep the pressure in the pressure-holding chamber 831 stable, forming a double seal.

[0065] Step 7: When the torque is applied to the knob 2, the rotating ring 73 drives the upper cylinder 74 to approach the lower cylinder 71. The upper ball 75 and the lower ball 72 form a resistance barrier due to the repulsive force of the same-pole spring. After the torque exceeds the threshold, the upper ball 75 overcomes the repulsive force and slides to the other side of the lower cylinder 71 and locks into the opening position. At the same time, the knob 2 drives the water-blocking plug 65 to rotate through the handle 67, so that the notch 66 and the water inlet hole 64 are completely aligned, opening the valve 6 channel. The arc strip 88 on the rotating ring 73 pushes the sliding rod 86, so that the rubber plug 861 moves away from the plug 85, the pressure chamber 831 is depressurized, and the water pressure on the water inlet side 821 pushes the piston 83 to compress the reset spring 832, forming a water passage gap. The water flows through the water inlet pipe 11, the water inlet side 821, the annular gap, the water outlet side 822, the water baffle 4, the water blocking block 63, and the water delivery pipe 68 to the water outlet pipe 12. At this time, the flow rate of the water passage section meets the metering requirements.

[0066] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A drip-proof faucet for direct drinking water pipeline, comprising a faucet (1) composed of a water inlet pipe (11) and a water outlet pipe (12), a rotary knob (2) being arranged at the upper end of the water inlet pipe (11), characterized in that: The water inlet pipe (11) is provided with a water baffle (3), the water baffle (3) is located at the upper end of the water outlet pipe (12), the water inlet pipe (11) is provided with a water baffle (4) located at the lower end of the water outlet pipe (12), the water baffle (3) and the water baffle (4) form a water inlet cavity (5), the water baffle (3) and the water baffle (4) are provided with a valve (6), the knob (2) is provided with a drip-proof device (7) located at the upper end of the water baffle (3); The drip-proof device (7) comprises a lower cylinder (71) embedded in the upper end of the water baffle (3), and the lower end of the lower cylinder (71) is provided with a lower ball (72) pressed by a spring; The knob (2) is provided with a rotating ring (73) located above the water baffle (3), the rotating ring (73) is provided with an upper cylinder (74) penetratingly arranged thereon, and the lower end of the upper cylinder (74) is provided with an upper ball (75) pressed by a spring.

2. A drip-proof faucet for direct drinking water in a pipe according to claim 1, characterized in that: The valve (6) comprises a water inlet cylinder (61) penetratingly arranged on the water baffle (3), the water inlet cylinder (61) is provided with a water inlet (62) located between the water baffle (3) and the water baffle (4), the lower end of the water inlet cylinder (61) is provided with a water blocking block (63), the water blocking block (63) is symmetrically provided with a water inlet hole (64), and the water blocking block (63) is rotatably provided with a water blocking plug (65), and the water blocking plug (65) is provided with a notch (66) corresponding to the water inlet hole (64). The water inlet cylinder (61) is rotatably provided with a handle (67) connected with the water blocking plug (65), and the handle (67) is connected with the knob (2).

3. The drip-proof faucet for direct drinking water in a pipe according to claim 1, characterized in that: The water baffle (4) is provided with a water conveying pipe (68) penetratingly arranged thereon, and one end of the water conveying pipe is connected with the lower end of the water blocking block (63).

4. The drip-proof faucet for direct drinking water in a pipe according to claim 1, characterized in that: The water inlet pipe (11) is provided with a water inlet valve (8) located below the water baffle (4); The water inlet valve (8) comprises a sleeve (81) arranged on the water inlet pipe (11), one end of the sleeve (81) penetrates into the water inlet pipe (11), the water inlet pipe (11) is provided with an arc-shaped baffle (82) located at the axis of the sleeve (81), and the convex surface of the arc-shaped baffle (82) faces the water baffle (4); The concave surface of the arc-shaped baffle (82) is a water inlet side (821), the convex surface of the arc-shaped baffle (82) is a water outlet side (822), and the sleeve (81) is slidably provided with a piston (83) corresponding to the arc-shaped baffle (82).

5. A drip-proof faucet for direct drinking water in a pipe according to claim 4, characterized in that: One end of the piston (83) away from the arc-shaped baffle (82) and the sleeve (81) form a pressure maintaining cavity (831), and the piston (83) is provided with a reset spring (832) located in the pressure maintaining cavity (831).

6. A drip-proof faucet for direct drinking water in a pipe according to claim 4, characterized in that: The piston (83) is provided with a connecting hole (833) communicating the pressure maintaining cavity (831) and the water inlet side (821).

7. A drip-proof faucet for direct drinking water in a pipe according to claim 5, characterized in that: One side of the sleeve (81) is provided with a valve block (84) located at the water outlet side (822), the valve block (84) is provided with a pressure relief cavity (841), the pressure relief cavity (841) is provided with a plug (85), and the plug (85) divides the pressure relief cavity (841) into an inner cavity (851) and an outer cavity (853); The valve block (84) is provided with a guide hole (852) communicating the inner cavity (851) and the pressure maintaining cavity (831), and the valve block (84) is provided with a communication hole (854) communicating the outer cavity (853) and the water outlet side (822).

8. A drip-proof faucet for direct drinking water in a pipe according to claim 7, characterized in that: A sliding rod (86) is slidably arranged in the pressure relief cavity (841), and one end of the sliding rod (86) is provided with a rubber plug (861) corresponding to the plug (85), and the rubber plug (861) is located in the outer cavity (853).

9. A drip-proof faucet for direct drinking water in a pipe according to claim 8, characterized in that: An arc-shaped groove (87) is formed in the water pan (3). One end of the sliding rod (86) slidably penetrates the water baffle (4) and extends to the arc-shaped groove (87) of the water pan (3), and the rotating ring (73) is provided with an arc-shaped strip (88) located in the arc-shaped groove (87), and one end of the arc-shaped strip is provided with a guide inclined surface (881).

10. The drip-proof faucet for direct drinking water in a pipe according to claim 8, characterized in that: A limiting ring (862) is arranged on the sliding rod (86), and a pressing spring (89) is arranged between the limiting ring (862) and the valve block (84).

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