Anti-siphon and anti-backflow pressure reducing valve
By introducing a one-way valve stem, spring, and sealing ring structure into the pressure reducing valve, combined with a limiting part and a limiting protrusion, the problems of siphon and backflow are solved, and the stable pressure reducing function of the pressure reducing valve with anti-siphon and anti-backflow is realized.
Patent Information
- Application Number
- CN202520490780.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing pressure reducing valves are prone to siphon and backflow during use, which can pollute water sources and cannot effectively reduce pressure to below 100 kPa.
An anti-siphon and anti-backflow pressure reducing valve was designed, comprising a valve body, an inlet channel housing, a movable seat, and a valve core assembly. It adopts a one-way valve stem, spring, and sealing ring structure, and is equipped with a limiting part and a limiting protrusion to prevent backflow and control the stroke of the movable seat, ensuring normal water flow.
It effectively prevents siphoning and backflow, ensuring that the water source is not polluted, and can adjust the pressure reduction effect under different needs to achieve stable outlet pressure.
Smart Images
Figure CN223854920U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pressure reducing valve technical field especially relates to a kind of anti-siphon backflow pressure reducing valve. BACKGROUND
[0002] Pressure reducing valve is a kind of automatic pressure reducing device, main effect is to the higher import pressure is automatically reduced to the required export pressure, and when import pressure and flow change, can automatically keep the stability of export pressure.
[0003] The water inlet and the water outlet of the existing pressure reducing valve structure are in a straight-through connection state, and in the case of drinking water and kitchen water, if water backflow / siphon phenomenon occurs, water source pollution will occur; The movable seat of the pressure reducing assembly has no limit of travel, which has the risk of blocking the water inlet channel of the pressure reducing platform of the movable seat, resulting in no water outlet, and the existing pressure reducing valve cannot effectively reduce the pressure to within 100 kPa. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a kind of anti-siphon backflow pressure reducing valve, solve the problem mentioned in the above background art.
[0005] To solve the above technical problems, the utility model adopts the technical scheme that:
[0006] A kind of anti-siphon backflow pressure reducing valve, including valve body, water inlet channel shell, movable seat and valve core assembly, the water inlet channel shell is installed at the water inlet of the valve body, and one end of the water inlet channel shell is inside the valve body, the other end is outside the valve body, the movable seat includes connecting part and limit part, the connecting part is movably jacketed on the outside of the water inlet channel shell, the outside of the connecting part is provided with pressure reducing spring, one end of the movable seat away from the water inlet channel shell is connected valve core assembly, the valve core assembly includes one-way valve stem, spring and first sealing ring, the end of the one-way valve stem is connected at the water outlet of the water inlet channel shell, the spring is jacketed on the one-way valve stem.
[0007] Further, one end of the water inlet channel shell outside the valve body is connected with quick connection interface assembly, and the outlet of the valve body is connected with quick connection interface assembly.
[0008] Further, the end of the limit part and the inner wall of the valve body form a pressure reducing zone.
[0009] Further, a shell upper cover is arranged at the water inlet of the valve body.
[0010] Further, the shell upper cover is welded on the valve body by ultrasonic welding.
[0011] Further, a second sealing ring is arranged between the outer side of the limit part and the inner wall of the valve body.
[0012] Further, a third sealing ring is arranged between the outer side of the water inlet channel shell and the inner wall of the movable seat.
[0013] Further, a limiting protrusion is arranged on the inner wall of the limiting part.
[0014] Beneficial effects:
[0015] The pressure reducing valve in the utility model is internally provided with a one-way valve assembly, can prevent backflow and siphon, thereby avoiding backflow pollution of water source, and the travel of the movable seat of the pressure reducing valve is limited, the movable seat is prevented from moving to an extreme position, and normal water flow is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a whole structure schematic view of the utility model.
[0017] Marked numbers in the figure: 1, valve body; 2, pressure reducing spring; 3, water inlet channel shell; 4, shell upper cover; 5, movable seat; 6, one-way valve stem; 7, spring; 8, quick coupling interface assembly; 9, second sealing ring; 10, first sealing ring; 11, third sealing ring; 12, connecting part; 13, limiting part; 14, limiting protrusion. DETAILED DESCRIPTION
[0018] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or can be integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0019] In addition, unless otherwise specified, the components used in the following embodiments are all existing components, and the corresponding connection methods can also be realized by conventional technical means, which will not be described one by one in this application. The utility model will be further described in detail below in combination with the drawings and specific embodiments.
[0020] EMBODIMENT
[0021] A siphon-proof and backflow-proof pressure reducing valve, like Figure 1As shown, the valve body 1, the water inlet channel shell 3, the movable seat 5 and the valve core assembly are included. The water inlet channel shell 3 is installed at the water inlet of the valve body 1, and one end of the water inlet channel shell 3 is inside the valve body 1 and the other end is outside the valve body 1. The movable seat 5 includes a connecting part 12 and a limiting part 13. The connecting part 12 is movably sleeved outside the water inlet channel shell 3, and a pressure relief spring 2 is sleeved outside the connecting part 12. One end of the movable seat 5 away from the water inlet channel shell 3 is connected with the valve core assembly. The valve core assembly includes a one-way valve stem 6, a spring 7 and a first sealing ring 10. The end of the one-way valve stem 6 is connected at the water outlet of the water inlet channel shell 3, and the spring 7 is sleeved on the one-way valve stem 6. The end of the limiting part 13 and the inner wall of the valve body 1 form a pressure relief zone, and the inner wall of the limiting part 13 is provided with a limiting protrusion 14.
[0022] Specifically, both ends of the valve body 1 of the pressure relief valve in the embodiment are a water inlet and a water outlet. A water inlet channel shell 3 is installed at the water inlet. A movable seat 5 is sleeved at the opening above the water inlet channel shell 3. The inside of the movable seat 5 and the water inlet channel shell 3 is provided with a water inlet channel and is connected. A one-way valve is installed at the opening above the movable seat 5. The one-way valve stem 6 is blocked at the water outlet of the movable seat 5. The spring 7 is sleeved on the one-way valve stem 6. The pressure relief spring 2 is sleeved outside the connecting part 12 of the movable seat 5. The limiting protrusion 14 is arranged on the inner wall above the port of the movable seat 5 close to the water inlet channel shell 3. The inner diameter of the limiting protrusion 14 is smaller than the inner diameter of the water inlet channel shell 3. Therefore, when the movable seat 5 moves downward, the limiting protrusion 14 inside is resisted by the water inlet channel shell 3 to limit the stroke of the movable seat 5.
[0023] In addition, in the embodiment, the pressure relief valve can realize high opening pressure by adjusting the force value of the spring 7, thereby adjusting the pressure relief effect. The periphery of the one-way valve is fixed by assembling a limiting part. The central region of the one-way valve becomes a sealing region by the first sealing ring 10, which can prevent reverse flow. The overall stroke of the one-way valve stem 6 is controlled within the limiting part by limiting the central region of the one-way valve in the chamber.
[0024] Preferably, one end of the water inlet channel shell 3 outside the valve body 1 is connected with a quick connection interface assembly 8 for connecting a water inlet pipeline. The outlet of the valve body 1 is connected with the quick connection interface assembly 8 for connecting a water outlet pipeline. The quick connection interface assembly 8 can be a commonly used quick connection pipeline interface assembly or other connection forms in the market, which is not limited herein.
[0025] Preferably, the water inlet of the valve body 1 is ultrasonically welded with a shell upper cover 4 to protect the valve body 1 from being damaged by the internal structure of the pressure relief valve.
[0026] Preferably, a second sealing ring 9 is arranged between the outer side of the limiting part 13 and the inner wall of the valve body 1, so as to ensure the sealing between the movable seat 5 and the valve body 1, thereby ensuring the pressure reduction effect of the pressure reducing valve.
[0027] Preferably, a third sealing ring 11 is arranged between the outer side of the water inlet channel shell 3 and the inner wall of the movable seat 5, so as to ensure the sealing between the water inlet channel shell 3 and the movable seat 5, thereby ensuring the pressure reduction effect of the pressure reducing valve.
[0028] Working process and principle:
[0029] First, the valve body 1, the movable seat 5 and the valve core assembly are pre-assembled, because the center area of the valve core assembly is a sealing area, so that reverse flow can be prevented, thereby controlling the overall stroke of the one-way valve stem 6 and the movable seat 5 within the limit; then the water inlet channel shell 3 and the pre-assembled movable seat 5 are pre-assembled, and the shell upper cover 4 is assembled; finally, the quick connection interface assembly 8 at both ends is assembled.
[0030] In use, water flows into the water inlet channel shell 3, pushes away the one-way valve assembly, passes through the internal channel of the movable seat 5, hits the platform of the movable seat 5 and the water outlet, i.e. the inner wall of the valve body 1 (the gap between the movable seat 5 and the valve body 1 can be referred to as a pressure reduction zone), provides a reaction force to the movable seat 5, and drives the movable seat 5 to walk back (because of the limit, the stroke of the movable seat 5 is fixed), thereby achieving pressure reduction, and the fluid flows out of the water outlet.
[0031] It should be noted that the pressure reducing valve in the embodiment can be customized by the spring force to customize the opening pressure to meet different needs.
[0032] Although the embodiments of the utility model are described in the specification, these embodiments are only as a hint, and should not limit the protection scope of the utility model. Various omissions, substitutions and changes made within the scope of the utility model without departing from the purpose of the utility model should be included in the protection scope of the utility model.
Claims
1. An antisiphon, antireflux pressure reducing valve characterized by: The utility model relates to a valve body, water inlet channel shell, movable seat and valve core assembly, the water inlet channel shell is installed at the water inlet of the valve body, and one end of the water inlet channel shell is inside the valve body, and the other end is outside the valve body, the movable seat includes connecting part and limiting part, the connecting part is movably sleeved on the outside of the water inlet channel shell, the outside of the connecting part is provided with pressure relief spring, one end of the movable seat away from the water inlet channel shell is connected with the valve core assembly, the valve core assembly includes one-way valve valve rod, spring and first sealing ring, the end of the one-way valve valve rod is connected at the water outlet of the water inlet channel shell, and the spring is sleeved on the one-way valve valve rod.
2. An anti-siphon, anti-reflux pressure reducing valve according to claim 1, characterized in that: One end of the water inlet channel shell outside the valve body is connected with quick connection interface assembly, and the outlet of the valve body is connected with quick connection interface assembly.
3. An anti-siphon, anti-reflux pressure reducing valve according to claim 1, wherein: The end of the limiting part and the inner wall of the valve body form a pressure relief zone.
4. An anti-siphon, anti-reflux pressure reducing valve according to claim 1, wherein: The water inlet of the valve body is provided with shell upper cover.
5. An anti-siphon, anti-reflux pressure reducing valve according to claim 4, wherein: The shell upper cover is welded on the valve body by ultrasonic.
6. An anti-siphon, anti-reflux, pressure reducing valve according to claim 1, wherein: The outer side of the limiting part and the inner wall of the valve body are provided with second sealing ring.
7. An anti-siphon, anti-reflux, pressure reducing valve according to claim 1, wherein: The outer side of the water inlet channel shell and the inner wall of the movable seat are provided with third sealing ring.
8. An anti-siphon, anti-reflux, pressure reducing valve according to claim 1, wherein: The inner wall of the limiting part is provided with limiting convex.