Lifting check valve spool and lifting check valve using the same

Abstract

The utility model relates to valve technical field especially, and more particularly relates to a lift check valve valve core and apply its lift check valve. The utility model discloses lift check valve valve core includes: outer valve core and inner valve core, outer valve core includes: outer valve plate, hollow guide rod is connected in the middle part of outer valve plate and extends upwards, inner valve core includes: inner valve plate, and the periphery is formed with valve hole, inner valve core guide rod is connected in the middle part of inner valve plate and extends upwards, wherein the outer surface of inner valve core guide rod matches with the inner chamber of hollow guide rod, and inner valve core guide rod extends into the inner chamber of hollow guide rod and can slide up and down, when outer valve plate falls, the valve hole of inner valve plate periphery is closed. The utility model discloses that lift check valve valve core is divided into two parts of inside and outside from the whole, and the quality of each part is lighter, and the opening pressure is obviously reduced, and the noise produced when closing is obviously reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a lift check valve core and a lift check valve using the same. Background Technology

[0002] Lift check valves are widely used in industries such as water supply and drainage, petrochemicals, metallurgy, and power. They play an important role in preventing backflow of media, protecting equipment safety, and maintaining stable system operation.

[0003] Figure 1A and Figure 1B The figures show the front and top views of the valve core of a prior art lift check valve. As shown, the valve core 100 of the lift check valve mainly consists of a guide rod 101 and a valve plate 102. The guide rod and valve plate are generally a single integral part, but they can also be connected together in a certain way. The guide rod moves up and down within the guide hole of the valve body, causing the valve plate to move together. The lower end face of the valve plate is the sealing surface.

[0004] Lift check valves are available in straight-through, vertical, horizontal, and wafer types, selected according to different installation methods and locations. During use, it is essential to ensure that the guide rod 101 is vertical and the valve plate 102 is below the guide rod. The valve core should move upwards to open the check valve. Different types of lift check valves have the same basic internal valve core structure and the same opening and closing principle. The valve core dimensions vary depending on the valve's pressure rating, size, and materials.

[0005] In the process of realizing this utility model, the applicant discovered that when the valve core of the lift check valve moves up and down in the valve body, it will cause problems such as difficulty in opening and closing the valve core and large opening resistance due to the influence of the valve core's gravity and motion friction. At the same time, it will generate a lot of noise when the valve core is closed. This is especially applicable to valve cores of medium and high pressure valves, where the valve core mass is greater, the valve core opening resistance is greater, and the noise generated when closing is greater. Utility Model Content

[0006] I. Technical problems to be solved

[0007] This invention aims to solve at least partially one of the aforementioned technical problems.

[0008] II. Technical Solution

[0009] The first aspect of this utility model provides a lift-type check valve core. The lift-type check valve core includes: an outer valve core and an inner valve core; the outer valve core includes: an outer valve plate; a hollow guide rod connected to the middle of the outer valve plate and extending upwards; the inner valve core includes: an inner valve plate with a valve hole formed on its periphery; an inner valve core guide rod connected to the middle of the inner valve plate and extending upwards; wherein the outer surface of the inner valve core guide rod matches the inner cavity of the hollow guide rod, and the inner valve core guide rod extends into the inner cavity of the hollow guide rod and can slide up and down; when the outer valve plate falls, it closes the valve hole on the periphery of the inner valve plate.

[0010] In some embodiments of this utility model, the valve core of the lift check valve is fitted with the valve seat; the horizontal projection of the inner valve plate covers the horizontal projection of the valve port inside the valve seat; the horizontal projection of the valve hole around the inner valve plate is at least partially located inside the horizontal projection of the valve port inside the valve seat.

[0011] In some embodiments of this utility model, the valve core of the lift check valve is in one of the following three states: closed state, with the inner valve plate attached to the upper part of the valve port on the inner side of the valve seat; the outer valve plate attached to the inner valve plate, covering the upper part of the valve hole on the outer side of the inner valve plate; the outer valve core is independently open state, with the inner valve plate attached to the upper part of the valve port on the inner side of the valve seat; the outer valve plate is separated from the inner valve plate, the valve hole on the outer side of the inner valve plate is open, and the medium flows along the path of the valve port, the valve hole, and the side of the outer valve plate; the valve core is fully open state, with the inner valve core driving the outer valve core to move upward, and the inner valve plate and the outer valve plate attached; the inner valve plate is separated from the valve seat, the valve port on the inner side of the valve seat is open, and the medium flows along the path of the valve port and the side of both the inner and outer valve plates.

[0012] In some embodiments of this utility model, N valve holes are evenly arranged around the periphery of the inner valve plate, where N≥2.

[0013] In some embodiments of this invention, N≥4.

[0014] In some embodiments of this utility model, the length of the hollow guide rod of the outer valve core satisfies the condition that the inner valve core guide rod can be completely inserted into the inner cavity of the hollow guide rod.

[0015] In some embodiments of this utility model, the lift-type check valve core is applied to horizontal, vertical, or wafer-type check valves.

[0016] In some embodiments of this utility model, the horizontal projections of the inner valve plate and the outer valve plate coincide;

[0017] In some embodiments of this utility model, the inner valve plate and the outer valve plate are made of one or more of the following materials: metal materials, engineering plastics.

[0018] In some embodiments of this utility model, a sealing surface is provided between the outer valve plate and the valve seat; a sealing component is provided between the outer valve plate and the inner valve plate, and the sealing component is made of one of the following materials: rubber, plastic, hard alloy.

[0019] The second aspect of this utility model provides a lift-type check valve. The lift-type check valve includes: a valve seat; and a lift-type check valve core as described above, the valve core being installed at the valve port position of the valve seat.

[0020] In some embodiments of this utility model, the lift check valve is one of the following types: straight-through, vertical, horizontal, or wafer type.

[0021] III. Beneficial Effects

[0022] This invention divides the valve core of the lifting check valve into two parts, inner and outer, making each part lighter and significantly reducing its opening pressure and noise during closing. Attached Figure Description

[0023] Figure 1A and Figure 1B These are the front view and top view of the valve core of a conventional lift check valve.

[0024] Figure 2A and Figure 2B These are cross-sectional and top views of the valve core of the lift-type check valve according to an embodiment of this utility model.

[0025] Figure 3A and Figure 3B for Figure 2A The diagram shows the independent opening state of the outer valve core and the overall opening state of the valve core in a lift check valve, which controls the fluid medium.

[0026] Figure 4 and Figure 5 These are cross-sectional views of a horizontal check valve and a vertical check valve, respectively, which use a lift-type check valve core. Detailed Implementation

[0027] The utility model concept is that the valve core of the lifting check valve is divided into inner and outer parts, the weight of each part is reduced, the opening pressure is significantly reduced, and the noise generated when closing is significantly reduced.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] In one exemplary embodiment of the present invention, a lift-type check valve core is provided. Figure 2A and Figure 2B These are, respectively, a sectional view and a top view of the valve core of the lift-type check valve according to an embodiment of this utility model. Figure 2B For easier understanding, dashed lines have been added to represent valve orifices. Please refer to [reference needed]. Figure 2A and Figure 2B In this embodiment, the valve core of the lift check valve includes: an outer valve core 210 and an inner valve core 220.

[0030] The outer valve core 210 includes: an outer valve plate 212; and a hollow guide rod 211 connected to the middle of the outer valve plate and extending upward. The outer valve core 210 can be opened and closed independently.

[0031] The inner valve core 220 includes: an inner valve plate 222 with a plurality of valve holes 223 formed around its periphery; and an inner valve core guide rod 221 connected to the middle of the inner valve plate and extending upward. The inner valve core 220 drives the outer valve core 210 to realize the overall opening and closing of the lifting check valve core.

[0032] The outer surface of the inner valve core guide rod 221 matches the inner cavity of the hollow guide rod 211. The inner valve core guide rod 221 extends into the inner cavity of the hollow guide rod and can slide freely up and down. When the outer valve plate falls, it closes the valve hole 223 around the inner valve plate.

[0033] Figure 3A and Figure 3B for Figure 2A The diagram shows the independent opening state and the overall opening state of the valve core of a lift check valve, enabling fluid medium control. The arrows in the diagram indicate the flow direction of the fluid medium. Please refer to... Figure 3A and Figure 3B The horizontal projection of the inner valve plate 222 covers the horizontal projection of the valve port 302 inside the valve seat; the horizontal projection of the valve hole 222 on the outer periphery of the inner valve plate is at least partially located inside the horizontal projection of the valve port 302 inside the valve seat. Based on the above structure, the valve core of the lift check valve in this embodiment can be switched between the following three states:

[0034] 1. Off state

[0035] like Figure 2A As shown, the inner valve plate is attached to the upper part of the valve port on the inner side of the valve seat; the outer valve plate is attached to the inner valve plate and covers the upper part of the valve hole on the outer periphery of the inner valve plate.

[0036] In practical scenarios, when the fluid flow rate is very small, the outer valve core 210 and the inner valve core 220 are integrated and rest on the valve seat 301. The lift check valve core is in the closed state, and the fluid medium cannot pass through.

[0037] 2. External valve core is independently open.

[0038] like Figure 3AAs shown, the inner valve plate 222 is attached to the valve port 302 on the inner side of the valve seat; the outer valve core 210 moves upward, the outer valve plate 212 separates from the inner valve plate 222, the valve hole 223 around the inner valve plate opens, and the medium flows through the path of valve port 302, valve hole 223, and the side of outer valve plate 212.

[0039] In practical scenarios, when the fluid flow rate or pressure is low, only a small amount of pressure is needed to open the outer valve core 210, ensuring normal fluid flow. Subsequently, if the flow rate or pressure decreases, the outer valve core will close, and because its mass is lighter than the overall structure, the noise generated during closure will be less.

[0040] 3. Valve core fully open

[0041] like Figure 3B As shown, the inner valve core 220 drives the outer valve core 210 to move upward, and the inner valve plate 222 and the outer valve plate 301 are in contact; the inner valve plate 222 separates from the valve seat 301, the valve port 302 on the inner side of the valve seat opens, and the medium flows along the path of the valve port 302 and the sides of both the inner valve plate and the outer valve plate.

[0042] In real-world scenarios, when the medium flow rate or pressure is high, there is sufficient pressure to drive the entire valve core to open, ensuring normal medium flow. Subsequently, if the flow rate or pressure decreases, when the lift check valve core closes, the inner valve core 220 closes first, followed by the outer valve core 210. Since both close separately and are lighter than the entire valve core, the noise generated during closure is relatively small.

[0043] Regarding the lift-type check valve core in this embodiment, the following aspects need to be explained:

[0044] 1. Arrangement and number of valve holes around the inner valve plate

[0045] In this embodiment, eight valve holes are evenly arranged around the inner valve plate. This arrangement allows multiple valve holes to disperse the inflow velocity of the fluid medium, maintaining the force balance of the inner valve plate.

[0046] This invention is not limited to this embodiment. In other embodiments of this invention, the size and number of valve holes are determined by the size of the valve core and the required valve core opening pressure. Specifically, one, two, or more valve holes can be provided; preferably, the number of valve holes is greater than four. Furthermore, the valve holes can be non-uniformly arranged on the inner valve plate, but in this case, the issue of force balance on the inner valve plate needs to be considered.

[0047] 2. Length of the hollow guide rod

[0048] In this embodiment, when the outer valve core guide rod is fully inserted into the hollow guide rod, the top end of the outer valve core guide tube is flush with the top end of the hollow guide rod. This design ensures that the valve core structure of the lift-type check valve in this embodiment is compact and convenient.

[0049] This utility model is not limited to this embodiment. In other embodiments of this utility model, as long as the length of the hollow guide rod of the outer valve core satisfies the requirement that the inner valve core guide rod can be fully inserted into the inner cavity of the hollow guide rod.

[0050] 3. Sealing surface

[0051] In this invention, a sealing component is provided on the sealing surface between the outer valve plate and the inner valve plate. The sealing component is made of one of the following materials: rubber, plastic, or hard alloy, to adapt to different fluid media and sealing requirements.

[0052] 4. Material

[0053] In this embodiment, the inner valve plate and the outer valve plate are made of metal.

[0054] This utility model is not limited to this embodiment. In other embodiments of this utility model, the inner valve plate and the outer valve plate may also be made of engineering plastics.

[0055] 5. Inner valve plate and outer valve plate

[0056] In this embodiment, the horizontal projections of the inner valve plate and the outer valve plate coincide, meaning that the horizontal dimensions of the inner valve plate and the outer valve plate are the same. In other embodiments of this utility model, the horizontal dimensions of the inner valve plate and the outer valve plate may also be different. The size of the outer valve plate may be larger or smaller than the size of the inner valve plate, as long as the outer valve plate can close the valve hole 223 around the inner valve plate when it falls.

[0057] Furthermore, the thickness of the inner and outer valve core plates depends on the actual operating conditions and specific materials, and there is no fixed proportional relationship. Those skilled in the art can design according to the actual needs of the scenario.

[0058] Based on the aforementioned lift-type check valve core, this utility model also provides a lift-type check valve. The lift-type check valve of this utility model embodiment includes: a valve seat; and the aforementioned lift-type check valve core, which is installed at the valve port position of the valve seat.

[0059] In this utility model, the lift check valve is one of the following types: straight-through, vertical, horizontal, or clamp type. Figure 4 and Figure 5 These are cross-sectional views of a horizontal check valve and a vertical check valve, respectively, which use a lift-type check valve core.

[0060] This concludes the description of all embodiments of this utility model. Based on the above description, those skilled in the art should have a clear understanding of this utility model.

[0061] It should be noted that for some implementation methods, if they are not key contents of this utility model and are well known to those skilled in the art, they are not described in detail in the accompanying drawings or text due to space limitations. In such cases, relevant prior art can be referred to for understanding.

[0062] Unless explicitly stated otherwise, the numerical values ​​and ranges mentioned in this utility model are approximate and can be changed according to the content of this utility model. Specifically, all figures in the specification and claims indicating the content of composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases, which means that they include a specific quantity varying by ±10% in some embodiments.

[0063] The directional terms used in this utility model, such as "center," "lateral," "longitudinal," "top," "bottom," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," indicate only the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, throughout the accompanying drawings, the same elements are represented by the same or similar reference numerals. Also, the shapes and dimensions of the components in the drawings do not reflect actual size and proportion, but only illustrate the content of embodiments of this utility model.

[0064] Those skilled in the art will understand that in the claims and description of this utility model, the word "comprising" does not exclude the presence of elements (or steps) not listed in the claims. The word "a" or "an" preceding an element (or step) does not exclude the presence of a plurality of such elements (or steps).

[0065] Furthermore, the purpose of providing the above embodiments is merely to enable the present invention to meet legal requirements, and the present invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0066] Similarly, it should be understood that, for the sake of brevity, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this approach should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, each aspect of the invention comprises fewer than all the features of the preceding single embodiment. Furthermore, embodiments may be used in combination with each other or with other embodiments based on design and reliability considerations; that is, technical features from different embodiments can be freely combined to form more embodiments. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the present invention.

[0067] The above specific embodiments have provided a detailed description of the purpose, technical means, and beneficial effects of this utility model. It should be understood that the purpose of the detailed description is to enable those skilled in the art to understand this utility model more clearly, and it is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lift-type check valve core, characterized in that, include: Outer valve core and inner valve core; The outer valve core includes: an outer valve plate; and a hollow guide rod connected to the middle of the outer valve plate and extending upward. The inner valve core includes: an inner valve plate with a valve hole formed on its periphery; and an inner valve core guide rod connected to the middle of the inner valve plate and extending upward. The outer surface of the inner valve core guide rod matches the inner cavity of the hollow guide rod, and the inner valve core guide rod extends into the inner cavity of the hollow guide rod and can slide up and down; when the outer valve plate falls, it closes the valve hole around the inner valve plate.

2. The lift-type check valve core according to claim 1, characterized in that, The valve core of the lift-type check valve is fitted with the valve seat; The horizontal projection of the inner valve plate covers the horizontal projection of the valve port inside the valve seat. The horizontal projection of the valve hole on the outer periphery of the inner valve plate is at least partially located inside the horizontal projection of the valve port on the inner side of the valve seat.

3. The lift-type check valve core according to claim 1, characterized in that, The valve core of the lift check valve is in one of the following three states: In the closed state, the inner valve plate is attached to the upper part of the valve port on the inner side of the valve seat; the outer valve plate is attached to the inner valve plate and covers the upper part of the valve hole on the outer periphery of the inner valve plate. When the outer valve core is independently open, the inner valve plate is attached to the upper part of the valve port on the inner side of the valve seat; when the outer valve plate is separated from the inner valve plate, the valve hole around the inner valve plate is opened, and the medium flows through the valve port, valve hole, and side of the outer valve plate. When the valve core is fully open, the inner valve core drives the outer valve core to move upward, and the inner valve plate and the outer valve plate are in contact; the inner valve plate is separated from the valve seat, the valve port on the inner side of the valve seat is opened, and the medium flows along the path of the valve port and the sides of both the inner valve plate and the outer valve plate.

4. The lift-type check valve core according to claim 1, characterized in that, The inner valve plate has N valve holes evenly arranged around its periphery, where N ≥ 2.

5. The lift-type check valve core according to claim 4, characterized in that, N≥4。 6. The lift-type check valve core according to claim 1, characterized in that, The length of the hollow guide rod of the outer valve core satisfies the condition that the inner valve core guide rod can be fully inserted into the inner cavity of the hollow guide rod.

7. The lift-type check valve core according to claim 1, characterized in that, The lift-type check valve core is used in horizontal, vertical, or wafer-type check valves. And / or, the horizontal projections of the inner valve plate and the outer valve plate coincide.

8. The lift-type check valve core according to claim 1, characterized in that, The inner valve plate and the outer valve plate are made of one or more of the following materials: metallic materials, engineering plastics; And / or, the sealing surface between the outer valve plate and the valve seat; the sealing surface between the outer valve plate and the inner valve plate is provided with a sealing component, which is made of one of the following materials: rubber, plastic, hard alloy.

9. A lift-type check valve, characterized in that, include: Valve seat; The lift check valve core as described in any one of claims 1 to 8 is installed at the valve port position of the valve seat.

10. The lift-type check valve according to claim 9, characterized in that, The lift check valve is one of the following types: straight-through, vertical, horizontal, or wafer.

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