Novel one-way valve

Abstract

A novel one-way valve comprises a cylindrical valve body, an annular boss and a center hole of the annular boss are integrally arranged on the inner wall of a liquid outlet end opening of the valve body, a disc is arranged at a liquid outlet, and a sealing ring is embedded in the outer circumference of the disc. A cylindrical guide frame is arranged in the valve body, one end of the guide frame is fixedly connected with the disc, the outer ring of the guide frame is movably sleeved with a return spring in a compressed state, and the two ends of the return spring abut against the position between the lower end of the guide frame and the annular boss respectively. Therefore, the disc and the annular boss extrude the sealing ring, and the sealing ring seals a gap between the disc and the annular boss. A valve is formed through the disc and the sealing ring, the disc and the annular boss extrude the sealing ring in cooperation with the guide frame and the return spring, the sealing ring conducts one-way sealing on a gap between the disc and the annular boss, resistance of the guide frame to fluid is small, and stable action of the valve is facilitated; therefore, the function stability of the one-way valve is ensured and resistance is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve body, concretely relates to a novel check valve. BACKGROUND

[0002] The check valve is a valve body for making liquid flow path or gas flow path one-way conduction at a node, and generally comprises a valve seat, a valve port is formed on the valve seat, and a valve is blocked on the valve port, the valve can only move or deform in one direction, so as to make the valve port one-way conduction, in some application scenarios, the check valve not only needs to be small, but also needs to have low resistance, and the reliability needs to be ensured, in a diesel oil filter hand oil pump of plastic (CN212615111U), the valve adopts an umbrella valve, the stability and the sealing property of the umbrella valve are poor, in a hand oil pump check valve (CN101440885A), the valve is abutted on the valve port through a spring, the structure is simple, but the valve does not have a guide structure, so that the valve is prone to failure. SUMMARY

[0003] In view of the problems in the prior art, the utility model provides a novel check valve, which aims to ensure the stability of the check valve function and reduce the resistance.

[0004] A novel check valve, comprising a cylindrical valve body, an annular boss is integrally arranged on the inner wall of the liquid outlet end port of the valve body, the center hole of the annular boss is the liquid outlet of the valve body, a disc is arranged at the liquid outlet, a sealing ring is embedded on the outer circumference of the disc, and the disc and the sealing ring constitute a valve; a cylindrical guide frame is arranged in the valve body, one end of the guide frame is fixedly connected with the disc, the guide frame and the disc are coaxially arranged, the guide frame is used for slidingly matching with the side wall of the center hole, a compression spring is movably sleeved on the outer ring of the guide frame, and the two ends of the compression spring are respectively abutted between the lower end of the guide frame and the annular boss, so that the disc and the annular boss extrude the sealing ring and the sealing ring seals the gap between the disc and the annular boss.

[0005] Further, an annular groove with a U-shaped cross section is formed on the outer circumference of the disc, the sealing ring is embedded in the annular groove, and the outer ring of the sealing ring is arranged outside the annular groove; the outer surface of the annular boss is a slope, the slope faces the sealing ring, and the annular boss is attached to the sealing ring through the slope.

[0006] Further, an annular body is integrally arranged on the outer wall of the liquid outlet end of the valve body, the outer circumferential surface of the annular body comprises a first annular slope, an annular plane and a second annular slope which are connected in sequence, the first annular slope, the annular plane and the second annular slope form a circumferential surface with a C-shaped cross section, and the generatrix of the annular plane is parallel to the axial direction of the valve body.

[0007] Further, the outer edge of the annular body is protruded on the liquid outlet end surface of the valve body and forms an annular protrusion, and the liquid outlet end surface of the annular protrusion is connected to the liquid outlet end surface of the valve body through a slope.

[0008] Further, the guide frame comprises a connecting ring parallel to the disc and connecting rods fixedly connected between the connecting ring and the disc, the connecting rods are uniformly distributed along the inner side edge of the end surface of the connecting ring and form a cylindrical frame structure, and the connecting rods are used for slidingly fitting with the side wall of the central hole; one end of the return spring abuts against the outer side edge of the end surface of the connecting ring, and the other end of the return spring abuts against the inner platform surface of the annular boss.

[0009] Further, the valve body, the disc and the guide frame are made of hard plastic.

[0010] The valve is formed by the disc and the sealing ring, the disc and the annular boss extrude the sealing ring by cooperating with the guide frame and the return spring, the sealing ring performs one-way sealing on the gap between the disc and the annular boss, the guide frame has small resistance to fluid, and the valve can stably operate, so that the stability of the one-way valve function is ensured and the resistance is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the utility model;

[0012] Figure 2 It is a sectional view of the utility model;

[0013] Figure 3 It is an installation schematic view of the utility model in the hand oil pump;

[0014] Figure 4 It is a comparison view of the resistance test results of the scheme and similar products. DETAILED DESCRIPTION

[0015] The utility model will be described in detail below in combination with the drawings. The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be interpreted as a limitation on the utility model. The left, middle, right, upper and lower directions in the embodiments of the utility model are only relative concepts or are used as the reference of the normal use state of the product, and should not be considered as a limitation.

[0016] A novel one-way valve, like Figure 1 and Figure 2As shown, the valve body 2 includes a cylindrical valve body 2, and an annular boss 21 is integrally arranged on the inner wall of the outlet port of the valve body 2. The center hole 22 of the annular boss 21 is the outlet of the valve body. A disc 11 is arranged at the outlet, and a sealing ring 13 is embedded on the outer circumference of the disc 11. The disc 11 and the sealing ring 13 constitute the valve 1. A cylindrical guide frame 5 is arranged in the valve body 2. One end of the guide frame 5 is fixedly connected with the disc 11. The valve body 2, the disc 11 and the guide frame 5 are all made of hard plastic material, such as PPA, PPA-GF, PPS, PA66 and PA6-GF. The guide frame 5 and the disc 11 are coaxially arranged. The guide frame 5 is used for slidingly fitting with the side wall of the center hole 22. A return spring 4 in a compressed state is movably sleeved on the outer circle of the guide frame 5. The two ends of the return spring 4 are respectively abutted between the lower end of the guide frame 5 and the annular boss 21. Specifically, the guide frame 5 includes a connecting ring 52 parallel to the disc 11 and a connecting rod 51 fixedly connected between the connecting ring 52 and the disc 11. The connecting rods 51 are uniformly distributed along the inner side edge of the end face of the connecting ring 52 and form a cylindrical frame structure. The outer diameter of the cylindrical frame structure is the same as the diameter of the disc 11. The connecting rods 51 are used for slidingly fitting with the side wall of the center hole 22. When the guide frame 5 slidingly fits with the center hole 22, the outer walls of the connecting rods 51 in the frame structure are all in abutment with and slidingly fit with the side wall of the center hole 22. One end of the return spring 4 is abutted against the outer side edge of the end face of the connecting ring 52, and the other end of the return spring 4 is abutted against the inner platform of the annular boss 21. Thus, the disc 11 and the annular boss 21 extrude the sealing ring 13 and make the sealing ring 13 seal the gap between the disc 11 and the annular boss 21.

[0017] In order to facilitate the extrusion of the disc 11 and the annular boss 21 on the sealing ring 13, an annular groove 12 with a U-shaped cross section is formed on the outer circumference of the disc 11. The sealing ring 13 is embedded in the annular groove 12. The outer circle of the sealing ring 13 is protrudingly arranged outside the annular groove 12. The outer platform of the annular boss 21 is a slope. The slope faces the sealing ring 13. The annular boss 21 is in abutment with the sealing ring 13 through the slope. The side wall of the annular groove 12 and the slope cooperatively extrude the sealing ring 13. Thus, the sealing ring 13 is sealingly arranged between the annular groove 12 and the slope. In this way, the one-way sealing of the outlet is realized, and the sealing effect of the sealing ring 13 is improved.

[0018] In addition, in order to facilitate the installation and use of the valve body 2, an annular body 3 is integrally arranged on the outer wall of the outlet end of the valve body 2. The outer circumferential surface of the annular body 3 includes a first annular slope 31, an annular plane 32 and a second annular slope 33 which are sequentially connected. The first annular slope 31, the annular plane 32 and the second annular slope 33 constitute a circumferential surface with a C-shaped cross section. The C-shaped circumferential surface is preferably an outer arc surface. The generatrix of the annular plane 32 is parallel to the axial direction of the valve body 2. Figure 3As shown, during installation, the annular body 3 is fitted in the liquid passage 6 in the hand oil pump in an interference fit, so as to facilitate the sealing fit between the annular body 3 and the liquid passage 6; in order to facilitate the guidance of the liquid flow direction through the one-way valve, the outer edge of the annular body 3 is protruded on the liquid outlet end face of the valve body 2 and forms an annular protruding part 34, and the liquid outlet end face of the annular protruding part 34 is connected with the liquid outlet end face of the valve body 2 through a slope.

[0019] During work, the liquid enters the valve body 2 from the lower end port of the valve body 2, and pushes the valve door 1 to move upward after overcoming the damping force of the return spring 4, so as to open the valve port; when the liquid pushes the valve door 1 from the upper end to the lower end, the annular boss 21 is blocked on the sealing ring 13, and the extrusion of the disc 11 and the annular boss 21 on the sealing ring 13 is stronger, so that the valve door 1 keeps the sealing of the valve port. Figure 4 As shown, through the hand oil pump oil pumping amount test, the utility model has lower resistance than other one-way valve products.

[0020] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and the utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A novel check valve, characterized in that: The valve includes a cylindrical valve body with an integrated annular boss on the inner wall of the outlet port. The central hole of the annular boss is the outlet of the valve body. A disc is located at the outlet, and a sealing ring is embedded on the outer circumference of the disc. The disc and the sealing ring together form the valve. A cylindrical guide frame is located inside the valve body. One end of the guide frame is fixedly connected to the disc. The guide frame and the disc are coaxially arranged. The guide frame is used for sliding engagement with the side wall of the central hole. A compressed return spring is movably sleeved on the outer ring of the guide frame. The two ends of the return spring abut against the lower end of the guide frame and the annular boss, respectively, so that the disc and the annular boss compress the sealing ring and seal the gap between the disc and the annular boss.

2. The novel check valve according to claim 1, characterized in that: A U-shaped annular groove is formed on the outer circumference of the disc. The sealing ring is embedded in the annular groove, and the outer ring of the sealing ring protrudes outside the annular groove. The outer surface of the annular boss is an inclined surface, which faces the sealing ring. The annular boss fits against the sealing ring through the inclined surface.

3. The novel check valve according to claim 1, characterized in that: An annular body is integrally formed on the outer wall of the liquid outlet end of the valve body. The outer circumferential surface of the annular body includes a first annular inclined surface, an annular plane, and a second annular inclined surface connected in sequence. The first annular inclined surface, the annular plane, and the second annular inclined surface form a circumferential surface with a C-shaped cross section. The generatrix of the annular plane is parallel to the axial direction of the valve body.

4. The novel check valve according to claim 3, characterized in that: The outer edge of the annular body protrudes from the liquid outlet end face of the valve body, forming an annular protrusion. The liquid outlet end face of the annular protrusion is connected to the liquid outlet end face of the valve body through a bevel transition.

5. The novel check valve according to claim 1, characterized in that: The guide frame includes a connecting ring parallel to the disk and a connecting rod fixedly connected between the connecting ring and the disk. Several connecting rods are evenly distributed along the inner edge of the end face of the connecting ring and form a cylindrical frame structure. The connecting rods are used to slide with the side wall of the central hole. One end of the return spring abuts against the outer edge of the end face of the connecting ring, and the other end of the return spring abuts against the inner surface of the annular boss.

6. The novel check valve according to claim 1, characterized in that: The valve body, disc, and guide frame are all made of rigid plastic.

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