Valve with double-cone structure

Abstract

The utility model discloses a valve with a double-cone structure, which relates to the technical field of valves, and comprises a valve seat, a valve cover and a valve rod, a through hole is arranged in the valve seat, the lower end of the valve rod is a valve plug part, the valve plug part is arranged in the through hole of the valve seat, the side wall of the valve seat is provided with a water outlet channel communicated with the through hole, the top end of the valve rod penetrates out of the top of the valve cover, and the top end of the valve cover is communicated with the water outlet channel. A through hole in the valve seat is a big-end-up conical hole, the valve plug portion is a big-end-up conical body, a circle of groove is formed in the position, opposite to a water outlet channel of the valve seat, of the outer wall of the valve plug portion when the valve plug portion is lifted upwards to the maximum, and the groove is opened towards the outer side. When the valve is closed, a part of water flow can be slowly contained in the groove, the probability that impurities brought by the water flow stay and are accumulated at the top of the valve plug and a thin gap between the valve plug and the valve seat can be reduced, it is guaranteed that the valve obtains good sealing performance in the closed state, water leakage is prevented, and the service life of the valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a double cone structure valve for controlling the opening, closing and flow of water and air. Background Technology

[0002] Existing valves, especially those used in daily water taps, generally include a valve seat, a valve cover, and a valve stem. The valve cover is mounted on the valve seat, and the lower part of the valve stem extends into the valve seat and mates with the seat's opening to seal the water flow. The lower end of the valve stem used for sealing the water flow uses a flat surface for sealing, and the inlet is also the outlet, resulting in poor sealing and easy leakage. To solve the sealing problem, valves with better sealing performance have been developed. Their structure includes a valve seat, a valve cover, and a valve stem. The valve seat has a through hole inside, and the side wall of the valve seat has a water outlet channel connecting to the through hole. The upper end of the valve seat is connected to the valve cover, and the lower end of the valve stem is a valve plug corresponding to the through hole of the valve seat. This valve plug is installed in the through hole of the valve seat, and the valve stem... The valve stem is connected to the valve cover via threads in the middle. The upper end of the valve stem extends outside the upper end of the valve cover. The upper part of the valve cover is connected to a pressure cap via threads. The lower part of the pressure cap extends into the valve cover and fits over the valve stem. A sealing ring is installed at the valve stem hole opening at the lower end of the valve cover to allow the valve plug of the valve stem to rise and press for sealing. The initial sealing performance of this patent was very good, but after use, it was found that because the circumferential surface of the valve plug is smooth, when the valve is opened, the water flows upward from the inlet and along the valve plug to the bottom of the sealing ring. Impurities in the water also rise upward. After the water stops, the impurities remain in the crevices. With long-term use, the impurities accumulate, and when the valve stem descends to close the water flow, it does not close completely, resulting in water leakage. Utility Model Content

[0003] The problem to be solved by this utility model is to provide a double cone structure valve that can solve the problem of dripping faucets.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: This double-cone structure valve includes a valve seat, a valve cover, and a valve stem. The valve seat has a through hole, and the lower end of the valve stem is a valve plug. The valve plug is installed in the through hole of the valve seat. The side wall of the valve seat has a water outlet channel communicating with the through hole. The top end of the valve stem protrudes from the top of the valve cover. The through hole in the valve seat is a conical hole that is larger at the top and smaller at the bottom. The valve plug is a conical body that is larger at the top and smaller at the bottom. On the outer wall of the valve plug, at a position opposite to the water outlet channel of the valve seat when the valve plug is opened to its maximum, a groove is formed to accommodate and slow down the upward rush of high-pressure water. The groove opens outward.

[0005] In the above-mentioned technical solution of the double cone structure valve, a more specific technical solution may be: the upper section of the valve stem has an embedded metal part, the metal part has an engineering nylon layer injected on its outside, the top of the metal part is connected to a connecting seat, the connecting seat has a connecting screw hole inside, and a plug section for connecting to the handle outside.

[0006] In some possible implementations, the bottom of the groove is arc-shaped.

[0007] In some possible implementations, the valve cover has an inner bore consisting of an upper through hole and a lower through hole, with the inner diameter of the upper through hole being larger than that of the lower through hole; the upper end of the valve seat is connected to the lower external thread of the valve cover via an internal thread, and the middle part of the valve stem is connected to the internal thread of the valve cover via an external thread; the top of the valve cover is covered with a pressure cap, which has a "T" shaped cross-section, with its central cylindrical body extending downward into the upper through hole of the valve cover and fitting around the valve stem; a sealing strip is provided between the valve stem and the wall of the cylindrical body; and a sealing ring is installed between the bottom of the upper through hole of the valve cover and the bottom of the cylindrical body of the pressure cap, with the sealing ring fitting around the valve stem.

[0008] In some possible implementations, the cylindrical body of the gland is connected to the valve cover via its external threads.

[0009] In some possible implementations, a sealing ring is installed at the lower end opening of the through hole in the lower part of the valve cover for the valve plug portion of the valve stem to rise and press for sealing; a sealing ring groove is provided on the lower end face of the valve seat.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0011] 1. Because a groove is formed on the outer wall of the valve plug at the position opposite the outlet channel of the valve seat when the valve plug is opened to its maximum, this groove is designed to accommodate and slow down the upward flow of high-pressure water. The groove opens outward. When the valve plug is raised and the high-pressure water flows upward from the inlet, most of the water flows directly through the outlet channel on the side of the valve seat. A small portion of the water flows into the groove and then flows out through the outlet channel on the side. The groove accommodates a portion of the backflow, preventing this portion of the water from flowing directly along the gap to the bottom of the valve cover. This reduces the chance of impurities in the water flow remaining and accumulating on the top of the valve plug and in the gap between the valve plug and the valve seat. This ensures that the valve has good sealing performance when closed, prevents water leakage, and extends the service life of the valve.

[0012] 2. A metal part is embedded in the upper section of the valve stem. This metal part is coated with an engineering nylon layer, which can increase the torque of the valve stem and improve its mechanical strength and wear resistance. Attached Figure Description

[0013] Figure 1 This is an axial sectional view of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model installed on a faucet.

[0015] Explanation of markings in the diagram:

[0016] Valve seat 1, through hole 1-1, water outlet channel 1-2, valve cover 2, valve stem 3, valve plug 3-1, groove 3-2, metal part 3-3, connecting seat 3-4, screw hole 3-5, pressure cap 4, cylindrical body 4-1, sealing strip 5, sealing ring 6, sealing ring 7, sealing ring groove 8, faucet outlet 9. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Figure 1 , Figure 2The double-cone valve shown includes a valve seat 1, a valve cover 2, and a valve stem 3. The valve seat 1 has a through hole 1-1. The lower end of the valve stem 3 is a valve plug 3-1, which is installed within the through hole 1-1 of the valve seat 1. The side wall of the valve seat 1 has two symmetrically arranged outlet channels 1-2 connecting the through holes. The top of the valve stem 3 protrudes from the top of the valve cover 2. The through hole in the valve seat 1 is a conical hole, wider at the top and narrower at the bottom. The valve plug 3-1 is a conical body, wider at the top and narrower at the bottom. On the outer wall of the valve plug 3-1, at a position opposite to the outlet channel 1-2 of the valve seat 1 when the valve plug is raised to its maximum position, a groove 3-2 is formed to accommodate and mitigate the upward flow of high-pressure water. This groove opens outwards, and the bottom of the groove is arc-shaped. The valve plug and valve seat are designed with a conical hole and a conical body. A groove is located at a certain position on the outside of the valve plug. When the valve plug is raised, the high-pressure water flows upward from the inlet. Most of the water flows directly from the outlet channel 1-2 on the side of the valve seat into the outlet 9 of the faucet. A small portion of the water flows into the groove and then flows out from the outlet channel on the side into the outlet 9 of the faucet. The groove accommodates a portion of the backflowing water, preventing this portion of the water from flowing directly along the gap to the bottom of the valve cover. This reduces the chance of impurities in the water flow staying and accumulating on the top of the valve plug and in the gap between the valve plug and the valve seat, ensuring that the valve has good sealing performance when closed and preventing water leakage.

[0020] In some embodiments, the upper section of the valve stem 3 has an embedded metal part 3-3, which can increase the torque of the valve stem and improve mechanical strength and wear resistance. The metal part is injection molded with an engineering nylon layer. The top of the metal part is connected to a connecting seat 3-4, which has a connecting screw hole 3-5 inside and a plug section for connecting to the handle outside.

[0021] In some embodiments, the valve cover 2 has an inner hole consisting of an upper through hole and a lower through hole, with the inner diameter of the upper through hole being larger than that of the lower through hole; the upper end of the valve seat 1 is connected to the lower external thread of the valve cover 2 via an internal thread, and the middle part of the valve stem 3 is connected to the internal thread of the valve cover 2 via an external thread; the top of the valve cover 2 is covered with a pressure cap 4, which has a "T" shaped cross section, with its central cylindrical body 4-1 extending downward into the upper through hole of the valve cover and fitting around the valve stem 3; a sealing strip 5 is provided between the valve stem 3 and the wall of the cylindrical body 4-1; and a sealing ring 6 is installed between the bottom of the upper through hole of the valve cover 3 and the bottom of the cylindrical body 4-1 of the pressure cap, which fits around the valve stem 3.

[0022] In some embodiments, the cylindrical body 4-1 of the gland 4 is connected to the valve cover 3 by its external thread; a sealing ring 7 is installed at the lower end opening of the lower through hole of the valve cover for the valve plug of the valve stem 3 to rise and press for sealing; a sealing ring groove 8 is provided on the lower end face of the valve seat 1.

[0023] This utility model can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A double-cone structure valve, comprising a valve seat, a valve cover, and a valve stem, wherein the valve seat has a through hole, the lower end of the valve stem is a valve plug portion, the valve plug portion is installed in the through hole of the valve seat, the side wall of the valve seat has a water outlet channel communicating with the through hole, and the top end of the valve stem protrudes from the top of the valve cover, characterized in that: The valve seat has an inner through hole that is tapered and wider at the top than at the bottom. The valve plug is a tapered body that is tapered and wider at the top than at the bottom. On the outer wall of the valve plug, when the valve plug is raised to its maximum position, a groove is formed at a position opposite to the water outlet channel of the valve seat to accommodate and slow down the upward flow of high-pressure water. The groove opens outward.

2. The double-cone valve according to claim 1, characterized in that: The upper section of the valve stem has an embedded metal part, which is coated with an engineering nylon layer. The top of the metal part is connected to a connecting seat, which has a connecting screw hole inside and a plug section for connecting to the handle outside.

3. The double-cone valve according to claim 1, characterized in that: The bottom of the groove is arc-shaped.

4. The double-cone valve according to claim 1, 2, or 3, characterized in that: The valve cover has an inner hole consisting of an upper through hole and a lower through hole, with the inner diameter of the upper through hole being larger than that of the lower through hole. The upper end of the valve seat is connected to the lower external thread of the valve cover via an internal thread, and the middle part of the valve stem is connected to the internal thread of the valve cover via an external thread. The top of the valve cover is covered with a pressure cap, which has a "T" shaped cross-section. The cylindrical body in the middle extends downward into the upper through hole of the valve cover and fits over the valve stem. A sealing strip is provided between the valve stem and the wall of the cylindrical body. A sealing ring is installed between the bottom of the upper through hole of the valve cover and the bottom of the cylindrical body of the pressure cap, and the sealing ring fits over the valve stem.

5. The double-cone valve according to claim 4, characterized in that: The cylindrical body of the gland is connected to the valve cover via its external threads.

6. The double-cone valve according to claim 4, characterized in that: The lower end of the through hole in the lower part of the valve cover is equipped with a sealing ring for the valve stem plug to rise and press for sealing; the lower end face of the valve seat is provided with a sealing ring groove.

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