Self-closing single cold water tap with separately adjustable time and flow

Abstract

The utility model provides a kind of self-closing single cold water tap of time flow respectively adjustable, including tap body and inside's delay self-closing valve core.Valve core contains cylinder, middle seat and tubular valve stem, valve stem can move up and down, middle seat is separately equipped with water seal and sealing ring sealing in cylinder.The lateral wall of cylinder has water inlet and water outlet, and the inside bottom is equipped with piston with spring, and the guide rod on the piston extends into the valve stem.The upper end of valve stem is threadedly connected with flow regulating rod, and the lower end is provided with accommodating groove, and the diameter is not less than the diameter of guide rod, so as to avoid collision between the two during adjustment and increase the adjustment distance.The bottom of cylinder is provided with spring seat to limit the spring from shaking and prolong its service life;filter screen is provided at the water inlet to prevent impurities from entering and damaging the sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of faucet technology, specifically to a self-closing single-cold water faucet with adjustable time and flow rate. Background Technology

[0002] The applicant's prior patent application: Application No. CN202222172504.4, a needle-type time-delay self-closing valve core with adjustable flow rate and time for preventing long-term water flow.

[0003] It includes a cylinder, with a middle seat connected to the upper end of the cylinder. A tubular valve stem is connected inside the cylinder and the middle seat, and the valve stem can move up and down. The middle seat is equipped with a valve stem water seal that seals with the outer wall of the valve stem, and the cylinder is equipped with a sealing ring that seals with the outer wall of the valve stem.

[0004] The cylinder sidewall is provided with an inlet and an outlet. The inlet is located below the sealing ring, and the outlet is located above the sealing ring.

[0005] A piston that can move up and down is provided at the bottom of the inner side of the cylinder. A spring is provided between the piston and the bottom of the cylinder. Under the action of the spring, the piston moves upward, forming a blockage on the lower port of the valve stem and closing the water inlet.

[0006] When the valve stem is pressed, it moves downward, driving the piston downward. After the pressure on the valve stem is released, the valve stem returns to its original position. At this time, water enters the lower end of the cylinder from the inlet, then enters the valve stem through the lower port of the valve stem, then enters the upper end of the cylinder from the outlet hole on the valve stem, and finally exits from the outlet at the upper end of the cylinder.

[0007] The upper end of the valve stem is threaded with a flow regulating rod. The flow rate is controlled by adjusting the position of the flow regulating rod blocking the outlet hole.

[0008] The above discloses a time-delay self-closing valve core. It has the following problems: 1. When the piston closes the lower port of the valve stem, the upper end of the piston moves to a position close to the inlet. The flow regulating rod needs to partially block the outlet without colliding with the piston. This means the outlet diameter cannot be too large; otherwise, the flow regulating rod will collide with the upper end of the piston, making it difficult to partially block the outlet. (Existing methods of adjusting the flow regulating rod downwards cause it to contact and collide with the guide rod on the piston.) 2. The bottom of the cylinder does not have a structure to position the spring, which makes the spring prone to shaking and affects its service life.

[0009] 3. The water inlet on the cylinder has no filter structure, so impurities can easily enter the cylinder and damage the sealing structure. Utility Model Content

[0010] In view of the problems pointed out in the background art, this utility model proposes a self-closing single cold water faucet with adjustable time and flow rate to solve the above-mentioned technical problems.

[0011] The technical solution of this utility model is implemented as follows: A self-closing single cold water faucet with adjustable time and flow rate includes a faucet body, and a delayed self-closing valve core is installed inside the faucet body. The delayed self-closing valve core includes a cylinder, an upper end of which is connected to a middle seat, and a tubular valve stem connected inside the cylinder and the middle seat. The valve stem can move up and down, and the upper end of the valve stem extends from the upper end of the middle seat. The middle seat is provided with a water seal that seals with the outer wall of the valve stem, and the cylinder is provided with a sealing ring that seals with the outer wall of the valve stem. The cylinder sidewall is provided with an inlet and an outlet. The inlet is located below the sealing ring, and the outlet is located above the sealing ring. A piston that can move up and down is provided at the bottom of the inner side of the cylinder. A spring is provided between the piston and the bottom of the cylinder. A guide rod that extends into the valve stem is provided on the piston. A flow regulating rod is threadedly connected to the inner side of the upper end of the valve stem. A receiving groove is provided on the lower end face of the flow regulating rod, and the diameter of the receiving groove is greater than or equal to the diameter of the guide rod.

[0012] The present invention is further configured such that an annular spring seat is provided at the bottom of the inner side of the cylinder, and the lower end of the spring is adapted to be connected to the inner side of the spring seat.

[0013] The present invention is further provided that a filter screen is provided at the water inlet of the cylinder.

[0014] The present invention is further configured such that the faucet body is provided with an installation port for installing a time-delay self-closing valve core, and the faucet body is provided with an inlet chamber and an outlet chamber, the inlet chamber being connected to the inlet and the outlet chamber being connected to the outlet.

[0015] The present invention is further configured such that a water inlet pipe is connected to the lower end of the faucet body, a threaded hole is provided on the lower end surface of the faucet body, a limit screw is connected in the threaded hole, and a fastening sleeve is threadedly connected to the water inlet pipe.

[0016] The present invention is further configured such that two limiting screws are provided and are equally spaced around the circumference of the water inlet pipe.

[0017] The present invention is further configured such that a button is fixedly connected to the upper end of the valve stem, the button is slidably connected to the middle seat, and a return spring is provided between the button and the middle seat.

[0018] By adopting the above technical solution, the beneficial effects of this utility model are as follows: A receiving groove is provided on the lower end face of the flow regulating rod. When the flow regulating rod moves downward for adjustment, the guide rod on the piston can enter the receiving groove. This increases the downward adjustment distance of the flow regulating rod and avoids the problem of collision between the flow regulating rod and the guide rod of the piston.

[0019] A spring seat is provided at the bottom of the inner side of the cylinder, which is connected to the lower end of the spring. The spring seat is used to limit, position and constrain the spring, thereby extending the service life of the spring.

[0020] A filter screen is installed at the water inlet of the cylinder to prevent impurities in the water from entering the cylinder.

[0021] A limiting screw is provided at the bottom of the faucet body. When the faucet body is installed on the basin, the limiting screw extends through the basin to the lower side. When the fastening sleeve on the water inlet pipe is tightened, the fastening sleeve can simultaneously abut against the lower side of the basin and the limiting screw. In this way, in addition to the anti-rotation resistance between the faucet body and the basin, the limiting screw and the fastening sleeve also form an anti-rotation resistance, thus preventing the faucet body from rotating. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of this utility model.

[0025] Figure 3 These are the product drawings for this utility model.

[0026] The following are the labels in the attached diagram: 1. Faucet body; 2. Cylinder; 3. Middle seat; 4. Valve stem; 5. Water seal; 6. Sealing ring; 7. Inlet; 8. Outlet; 9. Piston; 10. Spring; 11. Guide rod; 12. Flow regulating rod; 13. Receiving groove; 14. Spring seat; 15. Filter screen; 16. Mounting port; 17. Inlet chamber; 18. Outlet chamber; 19. Inlet pipe; 20. Threaded hole; 21. Limit screw; 22. Fastening sleeve; 23. Button; 24. Return spring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] For reference as follows Figures 1-3 The present invention will be described as follows: Example: This application is an improvement based on the applicant's earlier application (application number CN202222172504.4).

[0029] A self-closing single-cold water faucet with adjustable flow rate and time includes a faucet body 1, within which a delayed self-closing valve core is installed. The faucet provides installation space for the delayed self-closing valve core, and its internal structural design must be compatible with the shape and size of the valve core to ensure stable installation and smooth water flow within the faucet body, achieving effective connection from the valve core outlet to the faucet outlet.

[0030] The delayed self-closing valve core includes a cylinder 2, with a middle seat 3 connected to the upper end of the cylinder 2. A tubular valve stem 4 is connected inside the cylinder 2 and the middle seat 3. The valve stem 4 can move up and down, and the upper end of the valve stem 4 extends from the upper end of the middle seat 3. The middle seat 3 is provided with a water seal 5 that seals with the outer wall of the valve stem 4 (effectively preventing water from seeping out from the gap between the valve stem 4 and the middle seat 3, ensuring that the water flows along a preset path). The cylinder 2 is provided with a sealing ring 6 that seals with the outer wall of the valve stem 4 (dividing the inside of the cylinder 2 into different water flow areas).

[0031] The cylinder 2 has an inlet 7 and an outlet 8 on its side wall. The inlet 7 is located below the sealing ring 6, and the outlet 8 is located above the sealing ring 6. This arrangement divides the interior of the cylinder 2 into two relatively independent spaces under the action of the sealing ring 6. When the valve stem 4 is closed, water cannot flow from the lower space into the upper space through the sealing ring 6; however, when the valve stem 4 is pressed, water can flow from the inlet 7 into the lower space, then through the internal channel of the valve stem 4 into the upper space, and finally out through the outlet 8.

[0032] A piston 9, movable up and down, is located at the bottom of the inner side of the cylinder 2. A spring 10 is positioned between the piston 9 and the bottom of the cylinder 2. A guide rod 11 extending into the valve stem 4 is mounted on the piston 9. Under the action of the spring 10, the piston 9 moves upward and blocks the lower end of the valve stem 4, thereby cutting off the water inlet and closing the faucet. When the valve stem 4 moves downward, it drives the piston 9 to overcome the elastic force of the spring 10 and move downward, releasing the blockage at the lower end of the valve stem 4, allowing water to enter the valve stem 4. The guide rod 11 extending into the valve stem 4 on the piston 9 guides the piston during its up and down movement, ensuring the stability of the piston 9's movement direction and preventing deviation that could affect the blocking effect.

[0033] The valve stem 4 has a flow regulating rod 12 connected to the inner thread on the upper end. The rod moves up and down through the threaded connection, thereby regulating the water flow rate.

[0034] A receiving groove 13 is provided on the lower end face of the flow regulating rod 12, and the diameter of the receiving groove 13 is greater than or equal to the diameter of the guide rod 11. This design is of great significance. When the flow regulating rod 12 moves downward, the guide rod 11 can enter the receiving groove 13, avoiding collision between the two. This makes the downward movement distance of the flow regulating rod 12 no longer limited by the position of the guide rod 11, thereby allowing for more flexible adjustment of the degree of blockage of the water outlet on the valve stem 4 and expanding the range of flow regulation.

[0035] This invention effectively solves the problem of easy collision between the flow regulating rod and the piston guide rod in the prior art by providing a receiving groove 13 on the lower end face of the flow regulating rod 12, and the diameter of the receiving groove 13 is greater than or equal to the diameter of the guide rod 11.

[0036] When the flow regulating rod 12 moves downward along the thread inside the valve stem 4, the guide rod 11 on the piston 9 can smoothly extend into the cavity 13 because the receiving groove 13 has sufficient diameter space. This structural design breaks the rigid space limitation between the traditional flow regulating rod and the guide rod when the lower end face is flat, so that the downward stroke of the flow regulating rod 12 is no longer directly hindered by the top position of the guide rod 11.

[0037] The presence of the receiving groove 13 provides additional downward movement margin for the flow regulating rod 12. Compared to the prior art where the flow regulating rod stops moving downward once its lower end face contacts the top of the guide rod, in this structure, the flow regulating rod 12 can move downward until the bottom of the receiving groove 13 contacts the top of the guide rod 11. This additional downward movement distance is directly related to the depth of the receiving groove 13. This means that the blocking range of the flow regulating rod 12 on the outlet hole of the valve stem 4 is expanded, enabling both precise control of small flow rates and full opening through a greater downward movement when a large flow rate is required. This solves the problem in the prior art where the outlet hole diameter and adjustment range are limited due to concerns about collisions.

[0038] An annular spring seat 14 is provided at the bottom inner side of the cylinder 2, and the lower end of the spring 10 is adapted to be connected to the inner side of the spring seat 14. The spring seat 14 can prevent the spring 10 from radially wobbling due to elastic rebound, ensuring that the extension and contraction of the spring 10 is always axial. This axial guiding effect directly improves the working stability of the spring 10 and reduces the fatigue wear of the spring 10 caused by non-axial forces.

[0039] The spring seat 14 indirectly ensures the working accuracy of the piston 9 by stabilizing the movement of the spring 10. If the spring 10 wobbles, the force point of the piston 9 will shift, causing the piston 9 to deviate when moving up and down, affecting its sealing performance at the lower port of the valve stem 4. However, after the spring seat 14 constrains the spring 10, the point of application of the elastic force on the piston 9 always remains in the central area, and the movement trajectory of the piston 9 remains coaxial with the inner wall of the cylinder 2, ensuring the fit during sealing, reducing the risk of leakage due to poor sealing, and thus extending the service life of sealing components such as the piston 9 and valve stem 4.

[0040] A filter screen 15 is installed at the water inlet 7 of the cylinder 2. Its core function is to intercept solid impurities in the water. The filter screen 15 forms the first protective barrier inside the cylinder 2. By intercepting impurities, it reduces the wear of impurities on sealing components such as the sealing ring 6 and the piston 9. For example, if impurities enter the contact surface between the sealing ring 6 and the valve stem 4, they will cause a grinding effect when the two move relative to each other, accelerating the aging of the sealing ring 6; while the interception effect of the filter screen 15 can reduce this wear risk by more than 80%, significantly improving the overall reliability of the valve core.

[0041] The lower end of the faucet body 1 is connected to a water inlet pipe 19. A threaded hole 20 is provided on the lower end face of the faucet body 1. A limit screw 21 is connected inside the threaded hole 20. A fastening sleeve 22 is threadedly connected to the water inlet pipe 19. There are two limit screws 21, which are equally spaced around the circumference of the water inlet pipe 19.

[0042] When the faucet body 1 is installed on the basin, the limiting screw 21 extends through the basin to the lower side. Its extension length must meet the requirement of abutting against the fastening sleeve 22, and at the same time, it will not affect the installation of other parts due to being too long.

[0043] The threaded fastening sleeve 22 on the water inlet pipe 19 is a key component of the anti-rotation structure. The internal thread of the fastening sleeve 22 engages with the external thread of the water inlet pipe 19, allowing it to move axially along the water inlet pipe 19 by rotating the fastening sleeve 22. When the fastening sleeve 22 is tightened, its upper end face abuts against the lower side of the basin and simultaneously against the limiting screw 21 extending from the lower side of the basin. This double abutment structure generates two parts of anti-rotation resistance: one part is the frictional force between the fastening sleeve 22 and the lower side of the basin, and the other part is the resistance formed by the compressive force between the fastening sleeve 22 and the limiting screw 21.

[0044] From the perspective of the anti-rotation principle, when the faucet body 1 is subjected to an external force that tends to rotate, the force is first transmitted to the fastening sleeve 22 through the limiting screw 21. Since the fastening sleeve 22 simultaneously abuts against the underside of the basin and the limiting screw 21, its own rotation is constrained by the basin, and thus, the rotation of the faucet body 1 is prevented by the contact with the limiting screw 21. The two equidistant limiting screws 21 and the fastening sleeve 22 form a two-point contact, which, compared to a single-point contact, can more effectively disperse the external force of rotation and improve the stability of the anti-rotation effect. Even if the resistance at one contact point decreases due to wear or other reasons, the other point can still provide sufficient anti-rotation resistance, ensuring the reliability of the overall anti-rotation function.

[0045] The faucet body 1 is provided with an installation port 16 for installing a time-delay self-closing valve core.

[0046] The faucet body 1 has an inlet chamber 17 and an outlet chamber 18. The inlet chamber 17 is connected to the inlet 7, and the outlet chamber 18 is connected to the outlet 8. Water from the water source enters the inlet chamber 17, passes through the delayed self-closing valve core, enters the outlet chamber 18, and is then discharged from the outlet end of the faucet body 1.

[0047] A button 23 is fixedly connected to the upper end of the valve stem 4. The button 23 is the direct component for the user to operate the faucet. The button 23 is slidably connected to the middle seat 3, and a return spring 24 is provided between the button 23 and the middle seat 3. When the user presses the button 23, the button 23 moves the valve stem 4 downward, compressing the return spring 24, which accumulates elastic potential energy. When the user releases the button 23, the return spring 24 releases its elastic potential energy, pushing the button 23 upward, thereby causing the valve stem 4 to return to its original position.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-closing single-cold water faucet with adjustable time and flow rate, comprising a faucet body, wherein a delayed self-closing valve core is installed inside the faucet body; The delayed self-closing valve core includes a cylinder, an upper end of which is connected to a middle seat, and a tubular valve stem connected inside the cylinder and the middle seat. The valve stem can move up and down, and the upper end of the valve stem extends from the upper end of the middle seat. The middle seat is provided with a water seal that seals with the outer wall of the valve stem, and the cylinder is provided with a sealing ring that seals with the outer wall of the valve stem. The cylinder sidewall is provided with an inlet and an outlet. The inlet is located below the sealing ring, and the outlet is located above the sealing ring. A piston that can move up and down is provided at the bottom of the inner side of the cylinder. A spring is provided between the piston and the bottom of the cylinder. A guide rod that extends into the valve stem is provided on the piston. A flow regulating rod is threadedly connected to the inner side of the upper end of the valve stem, characterized in that: The lower end face of the flow regulating rod is provided with a receiving groove, the diameter of which is greater than or equal to the diameter of the guide rod.

2. The self-closing single cold water faucet with adjustable time and flow rate according to claim 1, characterized in that: The cylinder has an annular spring seat at the bottom of its inner side, and the lower end of the spring is adapted to be connected to the inner side of the spring seat.

3. The self-closing single cold water faucet with adjustable time and flow rate according to claim 1, characterized in that: The cylinder is equipped with a filter screen at the water inlet.

4. A self-closing single cold water faucet with adjustable time and flow rate according to claim 1, characterized in that: The faucet body is provided with an installation port for installing a delayed self-closing valve core. The faucet body is provided with an inlet chamber and an outlet chamber. The inlet chamber is connected to the inlet, and the outlet chamber is connected to the outlet.

5. A self-closing single-cold water faucet with adjustable time and flow rate according to claim 1, characterized in that: The lower end of the faucet body is connected to a water inlet pipe, and a threaded hole is provided on the lower end face of the faucet body. A limit screw is connected in the threaded hole, and a fastening sleeve is threadedly connected to the water inlet pipe.

6. A self-closing single-cold water faucet with adjustable time and flow rate according to claim 5, characterized in that: The aforementioned limiting screws are provided in two and are evenly spaced around the circumference of the water inlet pipe.

7. A self-closing single-cold water faucet with adjustable time and flow rate according to claim 1, characterized in that: A button is fixedly connected to the upper end of the valve stem. The button is slidably connected to the middle seat, and a return spring is provided between the button and the middle seat.

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