Valve element and pressure regulating valve

Abstract

The utility model relates to a valve core for a pressure regulating valve, the pressure regulating valve is provided with a valve seat, the valve core (10) comprises a framework component (1), a valve core (2) and a valve core (3), the framework component (1) is made of plastic materials through injection molding; and a sealing member (2) to be in sealing engagement with the valve seat, wherein the sealing member is made of a rubber material by overmolding and partially wraps the skeleton member (1) around the skeleton member. The utility model further provides a pressure regulating valve which comprises the valve element.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve core for a pressure regulating valve and a pressure regulating valve comprising the valve core. Background Art

[0002] In current pressure regulating valves, the valve core usually includes a powder metallurgy skeleton and a rubber overmolded onto the powder metallurgy skeleton. This skeleton is generally made of metal powder pressed into a block in a bottom mold, a middle mold and a punch die, and then dried and sintered.

[0003] Metal powder metallurgy products are susceptible to oxidation and rusting in the air. To prevent rust, the finished frame must be sealed and oiled with anti-rust oil for preservation. During valve core manufacturing, the powder metallurgy frame is typically almost completely encased in rubber. This results in the frame being comprised of only a few points on the bottom surface (e.g., nine points) and two on the sides in the injection mold. This inadequate positioning can lead to eccentricity in the rubber coating, resulting in quality defects.

[0004] In addition, for powder metallurgy skeletons, before injection, the skeleton must be fully degreased to remove the anti-rust oil, otherwise degumming defects will occur and the valve core function will fail, so the valve core cost is high. The valve core in the existing technology requires a lot of materials and the material cost is high. Utility Model Content

[0005] In order to overcome at least one aspect of the above problems, it is necessary to provide a valve core whose skeleton is injection molded from plastic material, which has low material cost, is suitable for storage at room temperature, and the injection mold structure used is simple.

[0006] To this end, the utility model provides a valve core for a pressure regulating valve, the pressure regulating valve having a valve seat, the valve core comprising: a skeleton component, wherein the skeleton component is made of a plastic material by injection molding; and a sealing component to be sealed with the valve seat, wherein the sealing component is made of a rubber material by overmolding (secondary injection) and surrounds the skeleton component (1) to partially cover the skeleton component.

[0007] In this utility model, the frame components are made of plastic, and the injection mold structure is simple, capable of multi-cavity production, resulting in low production costs. Compared with existing frame components made of powder metallurgy, the material cost is low and can be stored at room temperature. Furthermore, the frame components do not require processing before overmolding. The valve core injection mold is simple and reliable, ensuring quality and functionality, and significantly reducing valve core costs.

[0008] In a preferred embodiment of the present invention, the frame member is hollow and has a closed first end, an open second end, and an intermediate support section located between the first and second ends. The sealing member surrounds and covers the intermediate support section. Hollow frame sections are advantageous and can significantly save material costs.

[0009] To facilitate removal of the valve core from the injection mold after manufacture, the first end of the frame component is configured in a truncated cone shape; the second end of the frame component is configured in a cylindrical shape with an inner circumferential wall and an end face, wherein the inner circumferential wall is provided with a plurality of, for example, three, ribs extending axially along the frame component; and the intermediate support section of the frame component is configured in a circular ring shape. Advantageously, the frame component is configured in this manner so that it is positioned in the injection mold using the end face, the inner circumferential wall, and one of the ribs, ensuring reliable positioning and preventing the quality defect of eccentric rubber coating.

[0010] In a preferred embodiment of the present invention, the projection of the outer periphery of the valve core in a horizontal plane forms a first circle, and the projection of the first end in the horizontal plane forms a second circle. The centers of the first circle and the second circle do not coincide, thereby forming an eccentric boss at the first end. This structure of the frame component reduces noise and vibration during operation of a pressure regulating valve employing this valve core.

[0011] According to a preferred embodiment of the present invention, a plurality of recesses are provided in the outer peripheral wall of the intermediate support section, which are spaced apart along the circumference thereof, preferably evenly spaced apart, wherein the sealing component extends into the plurality of recesses, thereby enabling the sealing component to be more firmly connected to the skeleton component.

[0012] According to a preferred embodiment of the present invention, an annular groove is defined between the outer peripheral wall of the middle supporting section and the outer peripheral surface of the first end, wherein the sealing component extends into the annular groove to further connect the sealing component more firmly to the skeleton component.

[0013] In one embodiment, the frame member is preferably made of PPS-GF40 plastic. However, it should be understood that the frame member may also be made of other suitable plastic materials, which are also encompassed within the scope of the present invention.

[0014] In one solution of the present invention, the sealing component is preferably made of fluororubber material.

[0015] The utility model also provides a pressure regulating valve, which includes a valve seat and the valve core. The pressure regulating valve can also be called a pressure regulator, which can be used in a vehicle engine oil supply system.

[0016] By adopting the above technical solution, the present invention can produce at least one of the following beneficial technical effects: the skeleton component is injection molded from polyphenylene sulfide material, such as PPS-GF40 plastic, resulting in a simple injection mold structure, multi-cavity production, and reduced costs; the skeleton component's positioning structure in the injection mold consists of a bottom surface, holes, and anti-rotation ribs, ensuring secure positioning and preventing quality defects such as eccentricity of the rubber coating; the skeleton component is made of PPS-GF40 plastic, which is cheaper than metal powder metallurgy materials and can be stored at room temperature; the skeleton component does not require treatment before injection, the injection valve core mold is simple and reliable, quality and function are guaranteed, and the valve core cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] With reference to the accompanying drawings, further features and advantages of the present invention will be more clearly understood by reading the following detailed description:

[0018] Figure 1 is a perspective view of an embodiment of a valve core for a pressure regulating valve according to the utility model;

[0019] Figure 2 for Figure 1 A three-dimensional view of the valve core from the other side;

[0020] Figure 3 for Figure 1 A longitudinal sectional view of the valve core in FIG.

[0021] Figure 4 for Figure 1 Another longitudinal sectional view of the valve core in FIG.

[0022] Figure 5 for Figure 1 A top view of the valve core in FIG.

[0023] Figure 6 It is a perspective view of an embodiment of a skeleton component for a valve core according to the utility model;

[0024] Figure 7 for Figure 6 a perspective view of the illustrated frame components from the other side; and

[0025] Figure 8 It is a cross-sectional view of a pressure regulating valve adopting the valve core of the utility model. DETAILED DESCRIPTION

[0026] The following description will use examples and the accompanying drawings to describe a valve core and a pressure-regulating valve using the same according to the present invention. In the following description, numerous specific details are set forth to provide a more comprehensive understanding of the present invention for those skilled in the art. However, it will be apparent to those skilled in the art that the present invention may be implemented without some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, any combination of the following features and elements, regardless of whether they relate to different embodiments, may be used to implement the present invention.

[0027] Figure 1 and Figure 2 This is a perspective view of a valve core 10 for a pressure-regulating valve having a valve seat according to the present invention. As can be seen from the figure, the valve core 10 comprises a frame component 1 and a sealing component 2 partially overmolded around the frame component 1. When assembled to the pressure-regulating valve, the sealing component 2 is intended to sealably engage the valve seat. In this embodiment, the frame component 1 is advantageously formed from a plastic material, such as PPS-GF40, by injection molding, while the sealing component 2 is overmolded with a rubber material, such as fluororubber, in a secondary injection mold, securely attached to the frame component 1.

[0028] In this utility model, PPS-GF40 is a composite material made of polyphenylene sulfide (PPS) reinforced with 40% glass fiber (GF). It has the following advantages: high strength and high rigidity. Due to the glass fiber reinforcement, PPS GF40 exhibits excellent rigidity and strength at high temperatures; excellent heat resistance, good dimensional stability, chemical resistance, electrical properties (good electrical insulation and resistance to high-energy radiation); and good flame retardancy. Fluororubber material has excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance, and atmospheric aging resistance.

[0029] However, those skilled in the art will appreciate that the frame components are not limited to the aforementioned plastic materials, and composite materials of polyphenylene sulfide and other reinforcing materials such as carbon fiber, inorganic fillers, polytetrafluoroethylene, graphite, or liquid crystal polymers may also be used. The sealing components are not limited to being made of fluororubber, and other suitable rubber materials are also within the scope of this application.

[0030] In the above-described embodiment of the present invention, the frame components are injection-molded using a plastic material. Compared to existing frame components made of powder metallurgy, the injection mold structure is simpler and can be produced with multiple cavities, thereby reducing costs. The material cost of plastic materials, such as PPS-GF40, is significantly lower than that of metal powder metallurgy materials. Furthermore, frame components made of plastic material do not require rust-proofing.

[0031] Figure 3 and Figure 4 It is a longitudinal cross-sectional view cut at different positions of the valve core; Figure 5 for Figure 1 Top view of the valve core in the figure. Figure 6 and Figure 7 A perspective view of a preferred embodiment of a frame member 1 according to the present invention is shown. As can be seen from the figure, frame member 1 is hollow, having a closed first end 11, an open second end 12, and an intermediate support section 13 located between the first and second ends, for supporting a sealing member 2 that surrounds and wraps around it. The hollow structure of the frame member significantly saves material.

[0032] In order to facilitate the demoulding of the finished valve core from the injection mold, see Figure 3 and Figure 7 The first end 11 of the frame member 1 is configured in a frustoconical shape, while the second end 12 is configured in a cylindrical shape having an inner circumferential wall and an end surface 121. The inner circumferential wall is provided with a plurality of ribs 122 extending axially along the frame member; three ribs are shown in the figure. The intermediate support section 13 of the frame member 1 is configured in a circular cross-section.

[0033] See also Figure 5 The projection of the valve core 10 (specifically its outer periphery, especially the outer periphery of the sealing component) in a horizontal plane forms a first circle with a diameter of D1. The projection of the first end 11 (a frusto-conical shape) in the horizontal plane forms a second circle with a diameter of D2. D1 is greater than D2, and the center of the second circle is offset from the center of the first circle, meaning that the centers of the two circles do not coincide. Therefore, the first end of the valve core is configured as an eccentric boss, particularly a frusto-conical shape. This is advantageous because it minimizes vibration and noise generated during operation by a pressure regulating valve employing this valve core, effectively reducing fuel pump noise and improving vehicle comfort.

[0034] In a preferred embodiment, a plurality of recesses 131 are provided in the outer peripheral wall 130 of the intermediate support section 13 and are spaced apart along the circumference thereof, wherein the sealing member 2 extends into the plurality of recesses 131 (see FIG. Figure 4 ), thereby enabling the sealing component to be more securely connected to the frame component 1. Furthermore, an annular groove 14 is defined between the outer peripheral wall 130 of the intermediate support section 13 and the outer peripheral surface 111 of the first end 11, into which the sealing component extends, also facilitating a more secure connection to the frame component. The sealing component thus formed is generally annular.

[0035] Figure 8A cross-sectional view of a pressure-regulating valve 100 employing the valve core 10 according to the present invention is shown. This pressure-regulating valve, also known as a pressure regulator, can be used in an engine fuel supply system, for example, in conjunction with a fuel filter. The pressure-regulating valve 100 comprises a regulator housing 3, a valve core 10, a coil spring 5, and a rear cover 6. In this embodiment, the regulator housing 3 comprises an outer housing 31 and an inner housing 32. The inner and outer housings are fixedly connected and extend coaxially with each other. The inner housing defines a fluid passage 30 adapted for fluid communication with a receiving chamber. The end of the fluid passage facing the valve core 10 defines a valve seat 33. Preferably, the inner and outer housings are integrally injection-molded from a plastic material. In this embodiment, the inner housing 32 comprises a first inner housing section 321 and a second inner housing section 322 surrounded by the outer housing. The rear cover 6 is cylindrical in shape, defining the receiving chamber and having an oil outlet. Advantageously, the back cover 6 is molded from plastic material and can be directly fixedly connected to the regulator housing 3 , in which the coil spring 5 and the valve core 10 are located. Under the action of the compression force of the coil spring 5 , the sealing component of the valve core 10 seals and engages the valve seat 33 .

[0036] Those skilled in the art should understand that the valve core 10 according to the present invention is not limited to being applied to a pressure regulating valve, but can also be applied to other suitable valves, which are also covered within the scope of this application.

[0037] Although the present invention has been disclosed above with reference to preferred embodiments, the present invention is not limited thereto. Any combination, change, and modification made by any person skilled in the art without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims.

Claims

1. A valve core for a pressure regulating valve, the pressure regulating valve having a valve seat, characterized in that: The valve core (10) comprises: A frame component (1), wherein the frame component is made of a plastic material by injection molding; and A sealing component (2) is to be sealingly engaged with the valve seat, wherein the sealing component is made of a rubber material by overmolding and surrounds the frame component (1) to partially cover the frame component (1).

2. The valve core according to claim 1, characterized in that: The skeleton component (1) is hollow and has: a closed first end (11); an open second end (12); and An intermediate support section (13) is located between the first end and the second end, and the sealing component (2) surrounds and covers the intermediate support section.

3. The valve core according to claim 2, characterized in that: The first end (11) of the frame member is configured in a frustoconical shape; The second end (12) of the frame member is configured as a cylinder having an inner peripheral wall and an end surface (121), wherein the inner peripheral wall is provided with a plurality of ribs (122) extending in the axial direction of the frame member; and The middle supporting section (13) of the frame component is configured to have a circular ring shape in cross section.

4. The valve core according to claim 2 or 3, characterized in that: A plurality of recesses (131) are provided in the outer peripheral wall (130) of the intermediate support section (13) and are spaced apart along the circumference thereof, wherein the sealing member extends into the plurality of recesses.

5. The valve core according to claim 3, characterized in that: The projection of the outer periphery of the valve core in the horizontal plane is a first circle, and the projection of the first end in the horizontal plane is a second circle, wherein the center of the first circle does not coincide with the center of the second circle.

6. The valve core according to claim 4, characterized in that: An annular groove (14) is defined between an outer peripheral wall (130) of the intermediate support section (13) and an outer peripheral surface of the first end, wherein the sealing component extends into the annular groove.

7. The valve core according to any one of claims 1 to 3, characterized in that: The frame components are made of PPS-GF40 plastic.

8. The valve core according to any one of claims 1 to 3, characterized in that: The sealing component (2) is made of fluororubber material.

9. A pressure regulating valve, characterized in that: The pressure regulating valve (100) comprises a valve seat and a valve core (10) according to any one of claims 1 to 8.

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