A new check valve structure

Abstract

The utility model discloses a novel check valve structure, include: the valve cover is formed with valve cavity in it, import valve cover, export valve cover, its installation is at the both ends of valve cover, first valve ball seat, its setting is in the valve cavity of valve cover and is located between import valve cover and export valve cover, and first valve ball, its place is in the valve cavity of valve cover and is located between first valve ball seat and export valve cover, import valve cover and export valve cover adopt metal material to make, be provided with first sealing washer between the junction of import valve cover and valve cover, be provided with second sealing washer between the junction of export valve cover and valve cover, the end face of import valve cover away from the valve cover is embedded with third sealing washer, the end face of export valve cover away from the valve cover is embedded with fourth sealing washer, first sealing washer, second sealing washer, third sealing washer and fourth sealing washer adopt non -metal material to make. The utility model can transport pressure is higher, and stability is better.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport technology, and in particular to a novel one-way valve structure. Background Technology

[0002] In fluid transport systems in industries such as petrochemicals, biopharmaceuticals, scientific research, and environmental protection, various types of pumps (such as plunger pumps, diaphragm pumps, and piston pumps) require the use of check valves to control the unidirectional flow of fluids.

[0003] See Figure 1 The diagram shows the existing one-way valve structure, mainly using a ball-type one-way valve, specifically including a valve sleeve 10, an inlet valve cover 20, an outlet valve cover 30, a valve ball seat 40, and a valve ball 50. The valve sleeve 10 has a cylindrical structure, forming a valve cavity 11 inside. The inlet valve cover 20 and the outlet valve cover 30 are installed at both ends of the valve sleeve 10. The inlet valve cover 20 has an inlet flow channel through hole 21, and the outlet valve cover 30 has an outlet flow channel through hole 31. The valve ball seat 40 is installed in the valve cavity 11 of the valve sleeve 10 and is located between the inlet valve cover 20 and the outlet valve cover 30. The valve ball 50 is placed in the valve cavity 11 of the valve sleeve 10 and is located between the first valve ball seat 40 and the outlet valve cover 30.

[0004] Existing check valve structures primarily rely on the weight of the valve ball 50 as the reset force to achieve closure. The inlet valve cover 20 and outlet valve cover 30, designed for sealing with the pump head, are typically made entirely of engineering plastics. Under high pressure, these plastics can deform significantly or even crack, leading to high-pressure liquid leakage. Even when using high-performance engineering plastics (such as polyetheretherketone), their yield strength is far lower than that of metal materials. When system pressure increases to a higher level, the inlet valve cover 20 and outlet valve cover 30 are prone to excessive elastic deformation under fluid pressure, potentially leading to plastic deformation or cracking, resulting in high-pressure liquid leakage. Due to these material and structural deficiencies, the stable operating pressure of existing infusion pump check valves is limited to a relatively low level, making it difficult to meet the demands of modern industrial systems requiring higher operating pressures.

[0005] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a new type of one-way valve structure that can stably deliver higher pressure, in order to address the shortcomings of the existing technology.

[0007] The technical problem to be solved by this utility model can be achieved by the following technical solution: A novel one-way valve structure includes: A valve sleeve, wherein a valve cavity is formed within the valve sleeve; An inlet valve cover and an outlet valve cover are installed at both ends of the valve sleeve. The inlet valve cover has an inlet flow channel through hole, and the outlet valve cover has an outlet flow channel through hole. A first valve ball seat is disposed within the valve cavity of the valve sleeve and located between the inlet valve cover and the outlet valve cover; and The first valve ball is placed inside the valve cavity of the valve sleeve and located between the first valve ball seat and the outlet valve cover; The inlet valve cover and outlet valve cover are made of metal. A first sealing gasket is provided at the connection between the inlet valve cover and the valve sleeve, and a second sealing gasket is provided at the connection between the outlet valve cover and the valve sleeve. A third sealing gasket is embedded on the end face of the inlet valve cover away from the valve sleeve, and a fourth sealing gasket is embedded on the end face of the outlet valve cover away from the valve sleeve. The first, second, third, and fourth sealing gaskets are made of non-metallic materials.

[0008] In a preferred embodiment of this utility model, the inlet valve cover and the outlet valve cover are made of corrosion-resistant alloy.

[0009] In a preferred embodiment of this utility model, the first sealing gasket, the second sealing gasket, the third sealing gasket, and the fourth sealing gasket are made of engineering plastics.

[0010] In a preferred embodiment of the present invention, a first annular mounting groove is provided on the end face of the inlet valve cover away from the valve sleeve, and the third sealing gasket is embedded in the first annular mounting groove; a second annular mounting groove is provided on the end face of the outlet valve cover away from the valve sleeve, and the fourth sealing gasket is embedded in the second annular mounting groove.

[0011] In a preferred embodiment of this utility model, the liquid outlet flow channel through hole of the outlet valve cover is arranged eccentrically.

[0012] In a preferred embodiment of the present invention, a cylindrical limiting protrusion extending toward the first valve ball seat is formed at the periphery of the end face of the outlet valve cover facing the first valve ball seat. The end face of the cylindrical limiting protrusion abuts against the first valve ball seat, and the first valve ball is located inside the cylindrical limiting protrusion.

[0013] In a preferred embodiment of this utility model, a first valve ball sleeve is further included. The valve ball sleeve is disposed in the valve cavity of the valve sleeve and located between the first valve ball seat and the outlet valve cover. The first valve ball sleeve has a cylindrical structure. A first radial partition is provided inside the first valve ball sleeve. The first radial partition divides the interior of the first valve ball sleeve into a first valve ball movable chamber and a first manifold chamber. A plurality of first manifold holes are spaced apart circumferentially inside the first radial partition. Each first manifold hole connects the first valve ball movable chamber and the first manifold chamber. The first valve ball is located in the first valve ball movable chamber. The first manifold chamber is connected to the liquid outlet flow channel through hole of the outlet valve cover.

[0014] In a preferred embodiment of the present invention, a second valve ball seat, a second valve ball sleeve, and a second valve ball are further included. The second valve ball seat is disposed in the valve cavity of the valve sleeve and located between the inlet valve cover and the first valve ball seat. The second valve ball sleeve is disposed in the valve cavity of the valve sleeve and located between the second valve ball seat and the first valve ball seat. The top of the second valve ball sleeve is closed and has a flow channel through hole communicating with the central through hole of the first valve ball seat. The second valve ball is located inside the second valve ball sleeve.

[0015] In a preferred embodiment of this utility model, it further includes a third valve ball seat, a third valve ball sleeve, and a third valve ball. The third valve ball seat is disposed within the valve cavity of the valve sleeve and located between the inlet valve cover and the first valve ball seat. The third valve ball sleeve is disposed within the valve cavity of the valve sleeve and located between the third valve ball seat and the first valve ball seat. A second radial partition is provided inside the third valve ball sleeve, which divides the interior of the third valve ball sleeve into a second valve ball movable chamber and a second manifold chamber. A plurality of second manifold holes are circumferentially spaced within the second radial partition, and each second manifold hole connects the second valve ball movable chamber and the second manifold chamber. The third valve ball is located within the second valve ball movable chamber, and the second manifold chamber is connected to the central through hole of the first valve ball seat.

[0016] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: By using a high-strength metal valve cover as the main pressure-bearing structure, this utility model completely solves the problems of excessive deformation and cracking of plastic valve covers. Simultaneously, the unique embedded sealing gasket design, under the constraint of the metal enclosure, allows for controllable deformation of the sealing element, avoiding sealing failure and damage under high pressure, and extending service life. Compared with existing one-way valves, this utility model can deliver higher pressures and has better stability. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a structural diagram of an existing one-way valve.

[0019] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0021] Figure 4 This is a structural schematic diagram of Embodiment 3 of this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of Embodiment 4 of this utility model. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Example 1

[0024] See Figure 2 The figure shows a new type of one-way valve structure, including valve sleeve 100, inlet valve cover 200, outlet valve cover 300, valve ball seat 400 and valve ball 500.

[0025] The valve sleeve 100 has a cylindrical structure, forming a valve cavity 110 inside. An inlet valve cover 200 and an outlet valve cover 300 are installed at both ends of the valve sleeve 100. The inlet valve cover 200 has an inlet flow channel through hole 210, and the outlet valve cover 300 has an outlet flow channel through hole 310. The outlet flow channel through holes 310 are eccentrically arranged, and their main function is to precisely control the opening stroke of the valve ball 500 and prevent the valve ball 500 from blocking the flow path when it opens. The valve ball seat 400 is located within the valve cavity 110 of the valve sleeve 100, between the inlet valve cover 200 and the outlet valve cover 300. The valve ball 500 is located within the valve cavity 110 of the valve sleeve 100, between the valve ball seat 400 and the outlet valve cover 300.

[0026] A cylindrical limiting protrusion 330 extending toward the valve ball seat 400 is formed at the periphery of the end face of the outlet valve cover 300 facing the valve ball seat 400. The end face of the cylindrical limiting protrusion 330 abuts against the valve ball seat 400, and the valve ball 500 is located inside the cylindrical limiting protrusion 330. The cylindrical limiting protrusion 330 limits the valve ball seat 400 to ensure structural stability.

[0027] The inlet valve cover 200 and the outlet valve cover 300 are made of metal materials, preferably high-strength metal materials, and generally corrosion-resistant alloys, such as 316L stainless steel, are preferred. Their yield strength is greater than 170MPa. The metal material fundamentally solves the problem of deformation and cracking of the valve cover under high pressure, provides the main mechanical support, withstands the high pressure inside the system, and ensures structural stability.

[0028] A sealing gasket 610 is provided at the connection between the inlet valve cover 200 and the valve sleeve 100. The sealing gasket 610 is made of non-metallic material, preferably engineering plastic. The three parts are interference-fitted to ensure mutual sealing. A sealing gasket 620 is provided at the connection between the outlet valve cover 300 and the valve sleeve 100. The sealing gasket 620 is made of non-metallic material, preferably engineering plastic. The three parts are interference-fitted to ensure mutual sealing.

[0029] An annular mounting groove 220 is formed on the end face of the inlet valve cover 200 away from the valve sleeve 100, and a sealing gasket 630 is embedded in the annular mounting groove 220. An annular mounting groove 320 is formed on the end face of the outlet valve cover 300 away from the valve sleeve 100, and a sealing gasket 640 is embedded in the annular mounting groove 320. The sealing gaskets 630 and 640 are made of non-metallic materials, preferably engineering plastics. Because they are embedded in the metal inlet valve cover 200 and outlet valve cover 300, their deformation is effectively limited. Combined with a rationally designed sealing compression, under extremely high pressure, it can prevent excessive deformation leading to sealing failure or even cracking, ensuring that the working pressure of the novel one-way valve can meet the needs of modern industrial systems requiring higher working pressures. Example 2

[0030] The novel check valve structure in this embodiment is largely the same as the novel check valve structure in Embodiment 1, the difference being: See Figure 3A valve ball sleeve 700a is added between the valve ball seat 400a and the outlet valve cover 300a. The valve ball sleeve 700a is located inside the valve cavity 110a of the valve sleeve 100a and between the valve ball seat 400a and the outlet valve cover 300a. The valve ball sleeve 700a has a cylindrical structure and a radial partition 710a is provided inside. The radial partition 710a divides the interior of the valve ball sleeve 700a into a valve ball movable chamber 701a and a manifold chamber 702a. Several manifold holes 711a are circumferentially spaced inside the radial partition 710a. Each manifold hole 711a connects the valve ball movable chamber 701a and the manifold chamber 702a. The valve ball 500a is located inside the valve ball movable chamber 701a, and the manifold chamber 702a is connected to the liquid outlet flow channel through hole 310a of the outlet valve cover 300a.

[0031] The main function of this embodiment is to precisely control the opening stroke of the valve ball 500a and the flow of liquid when using a small-sized valve ball, so as to ensure the accuracy requirements of the check valve. Example 3

[0032] The novel check valve structure in this embodiment is largely the same as the novel check valve structure in Embodiment 1, except that a valve core is added to the novel check valve structure of Embodiment 1. See also Figure 4 The added valve core includes a valve ball seat 710b, a valve ball sleeve 720b, and a valve ball 730b. The valve ball seat 710b is disposed within the valve cavity 110b of the valve sleeve 100b and is located between the inlet valve cover 200b and the valve ball seat 400b. The valve ball sleeve 720b is disposed within the valve cavity 110b of the valve sleeve 100b and is located between the valve ball seat 710b and the valve ball seat 400b. The top of the valve ball sleeve 720b is closed and has a flow channel through hole 721b communicating with the central through hole of the valve ball seat 400. The valve ball 730b is located within the valve ball sleeve 720b.

[0033] This embodiment adds a set of valve cores to form a dual-core check valve. When conveying complex media, the different properties of the liquid media, such as density, concentration and cleanliness, will affect the valve ball in the check valve, which may not be able to reset in time and accurately, causing the check valve to fail to close and resulting in check valve failure. The dual-core check valve is more stable than the single-core check valve. Even if one set of valve cores fails to close properly, the check valve can still work normally, with a higher fault tolerance rate. It reduces the failure rate caused by valve ball jamming or inaccurate reset and can stably convey more types of media. Example 4

[0034] The novel check valve structure in this embodiment is largely the same as the novel check valve structure in Embodiment 2, except that a valve core is added to the novel check valve structure in Embodiment 2. (See [link to previous embodiment]). Figure 5The added valve core includes a valve ball seat 710c, a valve ball sleeve 720c, and a valve ball 730c. The valve ball seat 710c is located in the valve cavity 110c of the valve sleeve 100c and between the inlet valve cover 200c and the valve ball seat 400c. The valve ball sleeve 720c is located in the valve cavity 110c of the valve sleeve 100c and between the valve ball seat 710c and the valve ball seat 400c. The valve ball sleeve 720c is provided with a radial partition 721c, which divides the interior of the valve ball sleeve 720c into a valve ball movable chamber 722c and a manifold chamber 723c. A plurality of manifold holes 7211c are circumferentially spaced in the radial partition 721c, and each manifold hole 7211c connects the valve ball movable chamber 722c and the manifold chamber 723c. The valve ball 730c is located in the valve ball movable chamber 722c, and the manifold chamber 723c is connected to the central through hole of the valve ball seat 400c.

[0035] This embodiment adds a set of valve cores to form a dual-core check valve. When conveying complex media, the different properties of the liquid media, such as density, concentration and cleanliness, will affect the valve ball in the check valve, which may not be able to reset in time and accurately, causing the check valve to fail to close and resulting in check valve failure. The dual-core check valve is more stable than the single-core check valve. Even if one set of valve cores fails to close properly, the check valve can still work normally, with a higher fault tolerance rate. It reduces the failure rate caused by valve ball jamming or inaccurate reset and can stably convey more types of media.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel one-way valve structure, characterized in that, include: A valve sleeve, wherein a valve cavity is formed within the valve sleeve; An inlet valve cover and an outlet valve cover are installed at both ends of the valve sleeve. The inlet valve cover has an inlet flow channel through hole, and the outlet valve cover has an outlet flow channel through hole. The first valve ball seat is disposed in the valve cavity of the valve sleeve and located between the inlet valve cover and the outlet valve cover; as well as The first valve ball is placed inside the valve cavity of the valve sleeve and located between the first valve ball seat and the outlet valve cover; The inlet valve cover and outlet valve cover are made of metal. A first sealing gasket is provided at the connection between the inlet valve cover and the valve sleeve, and a second sealing gasket is provided at the connection between the outlet valve cover and the valve sleeve. A third sealing gasket is embedded on the end face of the inlet valve cover away from the valve sleeve, and a fourth sealing gasket is embedded on the end face of the outlet valve cover away from the valve sleeve. The first, second, third, and fourth sealing gaskets are made of non-metallic materials.

2. The novel one-way valve structure as described in claim 1, characterized in that, The inlet and outlet valve covers are made of corrosion-resistant alloy.

3. The novel one-way valve structure as described in claim 1, characterized in that, The first, second, third, and fourth sealing gaskets are made of engineering plastics.

4. The novel one-way valve structure as described in claim 1, characterized in that, A first annular mounting groove is formed on the end face of the inlet valve cover away from the valve sleeve, and the third sealing gasket is embedded in the first annular mounting groove. A second annular mounting groove is formed on the end face of the outlet valve cover away from the valve sleeve, and the fourth sealing gasket is embedded in the second annular mounting groove.

5. The novel one-way valve structure as described in claim 1, characterized in that, The outlet valve cover has an eccentrically arranged liquid flow channel through hole.

6. The novel one-way valve structure as described in claim 1, characterized in that, A cylindrical limiting protrusion extending toward the first valve ball seat is formed at the periphery of the end face of the outlet valve cover facing the first valve ball seat. The end face of the cylindrical limiting protrusion abuts against the first valve ball seat, and the first valve ball is located inside the cylindrical limiting protrusion.

7. The novel one-way valve structure according to any one of claims 1 to 6, characterized in that, It also includes a first valve ball sleeve, which is disposed in the valve cavity of the valve sleeve and located between the first valve ball seat and the outlet valve cover. The first valve ball sleeve has a cylindrical structure and a first radial partition is provided inside the first valve ball sleeve. The first radial partition divides the interior of the first valve ball sleeve into a first valve ball movable chamber and a first manifold chamber. A plurality of first manifold holes are spaced apart circumferentially inside the first radial partition. Each first manifold hole connects the first valve ball movable chamber and the first manifold chamber. The first valve ball is located in the first valve ball movable chamber, and the first manifold chamber is connected to the liquid outlet flow channel through hole of the outlet valve cover.

8. The novel one-way valve structure according to any one of claims 1 to 6, characterized in that, It also includes a second valve ball seat, a second valve ball sleeve, and a second valve ball. The second valve ball seat is disposed in the valve cavity of the valve sleeve and located between the inlet valve cover and the first valve ball seat. The second valve ball sleeve is disposed in the valve cavity of the valve sleeve and located between the second valve ball seat and the first valve ball seat. The top of the second valve ball sleeve is closed and has a flow channel through hole communicating with the central through hole of the first valve ball seat. The second valve ball is located inside the second valve ball sleeve.

9. The novel one-way valve structure as described in claim 7, characterized in that, It also includes a third valve ball seat, a third valve ball sleeve, and a third valve ball. The third valve ball seat is disposed within the valve cavity of the valve sleeve and located between the inlet valve cover and the first valve ball seat. The third valve ball sleeve is disposed within the valve cavity of the valve sleeve and located between the third valve ball seat and the first valve ball seat. The third valve ball sleeve is provided with a second radial partition, which divides the interior of the third valve ball sleeve into a second valve ball movable chamber and a second manifold chamber. A plurality of second manifold holes are circumferentially spaced within the second radial partition, and each second manifold hole connects the second valve ball movable chamber and the second manifold chamber. The third valve ball is located within the second valve ball movable chamber, and the second manifold chamber is connected to the central through hole of the first valve ball seat.

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