Reduced pressure mechanical valve

Abstract

The application discloses a pressure-reducing mechanical valve, which comprises an upper pressure-reducing ring, a lower pressure-reducing ring, a support main body, a central shaft and a sliding valve; the support main body is in a hollow metal frame structure; a central shaft is fixed in the support main body along the axial direction of the support main body; the sliding valve is sleeved on the central shaft and can slide up and down along the central shaft; when the sliding valve moves from the lower part to the upper part, the mechanical valve is opened; when the sliding valve moves from the upper part to the lower part, the mechanical valve is closed; an upper pressure-reducing ring is arranged on the outer ring of the upper part of the support main body; and a lower pressure-reducing ring is arranged on the outer ring of the lower part of the support main body. According to the application, the support main body and the sliding valve are matched to realize the one-way opening of the mechanical valve; meanwhile, the upper pressure-reducing ring and the lower pressure-reducing ring are arranged outside the support main body to reduce the stress of the sliding valve, which is beneficial to the long service life of the mechanical valve.

Description

TECHNICAL FIELD

[0001] The present application relates to a mechanical valve, in particular a pressure reducing mechanical valve that can be used in heart valve replacement. BACKGROUND

[0002] Heart valves grow between atrium and ventricle, ventricle and aorta, and function as one-way valves to help blood flow in one direction. The four valves in the human body are called the mitral valve, tricuspid valve, aortic valve and pulmonary valve. If these valves become diseased (such as becoming narrow or not closing completely), it will affect the movement of blood flow, thereby causing abnormal heart function, and eventually leading to heart failure.

[0003] Currently, when the valve becomes diseased, valve replacement is often used for treatment, that is, artificial mechanical valve or biological valve is replaced. The known heart mechanical valve structure is a ball valve or a butterfly valve. The ball valve has been gradually replaced by the butterfly valve, for example, the butterfly valve structure disclosed in patent No. WO2021138502A1. The movable part bears a large pressure, so the material shape is complex, and thrombosis factors are also easy to produce. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a pressure reducing mechanical valve, which reduces the pressure bearing of the movable part of the mechanical valve through pressure reducing design and valve body design, and improves the service life of the movable valve body.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] In a first aspect, the embodiments of the present application provide a pressure reducing mechanical valve, comprising an upper pressure reducing ring, a lower pressure reducing ring, a support body, a center shaft and a slide valve; the outer diameter of the support body increases first and then decreases from top to bottom, forming a hollow metal frame structure with large middle and small ends; a center shaft is arranged in the support body along the axial direction of the support body, and the slide valve is sleeved on the support body. When the slide valve moves from bottom to top, the mechanical valve opens, and when the slide valve moves from top to bottom, the mechanical valve closes. An upper pressure reducing ring is arranged on the outer circle of the upper part of the support body, and a lower pressure reducing ring is arranged on the outer circle of the lower part of the support body. The reverse blood flow is secondarily reduced by the upper pressure reducing ring and the lower pressure reducing ring, thereby reducing the stress on the slide valve and being beneficial to the long service life of the mechanical valve.

[0007] As a further technical scheme, the slide valve is in the shape of a flying disc with thick middle and thin edges.

[0008] As a further technical scheme, a limiting part is arranged on the top of the center shaft to limit the movement position of the slide valve.

[0009] As a further technical scheme, the pressure reducing ring is in the shape of a hollow disc with a center.

[0010] As a further technical solution, the support body comprises a plurality of support units, the bottoms of the plurality of support units are connected together to form a containing space of the slide valve.

[0011] As a further technical solution, the central shaft is fixed on the support body, the outer surface has a spiral flow guide groove, and the inner surface of the slide valve has a spiral flow guide groove; the spiral flow guide groove is arranged to provide a static pressure environment for the middle shaft of the slide valve, avoid unilateral adsorption stress, thereby providing additional lubrication and increasing the service life of the slide valve.

[0012] As a further technical solution, the material of the slide valve is at least one of a high polymer material, a biological tissue material and a tissue engineering material.

[0013] The beneficial effects of the above embodiments of the present application are as follows:

[0014] The present application realizes one-way opening of the mechanical valve through cooperation of the support body and the slide valve, and reduces the stress of the slide valve by arranging the upper and lower pressure reduction rings outside the support body, which is conducive to prolonging the service life of the mechanical valve. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute an improper limitation on the present application.

[0016] Figure 1 is a three-dimensional principle diagram of the present application.

[0017] Figure 2 is a three-dimensional diagram of the closed slide valve of the present application.

[0018] In the figure, 1 is an upper pressure reduction ring, 2 is a support body, 3 is a lower pressure reduction ring, 4 is a central shaft, 5 is a limiting part, and 6 is a slide valve. DETAILED DESCRIPTION

[0019] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0020] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0021] For the convenience of description, if the terms "upper", "lower", "left", "right" are used in the present application, they only mean the same direction as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0022] As introduced in the background, the butterfly-shaped valve structure of the heart valve in the prior art, the movable part bears large pressure, and the material shape is complex, which is easy to produce thrombosis factors. In order to solve the above technical problems, the present application proposes a pressure reduction mechanical valve, which reduces the pressure bearing of the movable part of the mechanical valve through pressure reduction design and valve body design, and improves the service life of the movable valve body.

[0023] In a typical embodiment of the present application, as shown in Figure 1 The present embodiment proposes a pressure reduction mechanical valve, which comprises an upper pressure reduction ring 1, a lower pressure reduction ring 3, a support body 2, a center shaft 4 and a slide valve 5; the outer diameter of the support body 2 increases first and then decreases from top to bottom, thereby forming a structure with large middle diameter and small both ends, similar to the hollow metal frame structure of an American football, but the top radius of the support body 2 is larger than the bottom radius, and the support body 2 is an asymmetric structure; a center shaft 4 is arranged in the support body 2 along the axial direction of the support body 2, and the slide valve is sleeved on the support body; when the slide valve moves upward from bottom to top, the mechanical valve is opened, and when the slide valve moves downward from top to bottom, the mechanical valve is closed; an upper pressure reduction ring is arranged on the outer circle of the upper part of the support body, and a lower pressure reduction ring is arranged on the outer circle of the lower part of the support body, the reverse blood flow is subjected to secondary pressure reduction through the upper pressure reduction ring and the lower pressure reduction ring, thereby reducing the stress of the slide valve, which is beneficial to the long service life of the mechanical valve.

[0024] As a further technical scheme, the outer diameter of the slide valve 6 increases first and then decreases from top to bottom, the diameter of the middle part of the slide valve 6 is the largest, the diameters of the upper part and the lower part are reduced, the lower part of the slide valve 6 is hemispherical, the upper part of the slide valve 6 is conical, and the diameter of the upper part is smaller than that of the lower part. When the slide valve 6 moves upward under the push of the blood, since the outer diameter of the upper part of the support body 2 is larger than that of the lower part, the gap between the slide valve 6 and the support body 2 becomes larger as the slide valve 6 slides upward, and then the blood can flow upward through the gap. When the blood flows downward, the slide valve 6 is pushed to move downward. Since the outer diameter of the lower part of the support body 2 is smaller than that of the upper part, when the largest outer diameter part of the middle part of the slide valve 6 moves to the largest inner diameter part of the support body 2, the slide valve 6 cannot move downward any more, and there is no gap between them. Therefore, the whole mechanical valve is closed, as shown in FIG. 6, and the blood cannot flow back at this time, thereby meeting the requirement of one-way blood flow at the position of the heart valve. Figure 2

[0025] Further, the slide valve 6 can be made of at least one of a high polymer material, a biological tissue material and a tissue engineering material. The slide valve 6 is an internal hollow structure and has a membrane-shaped structure on the outside.

[0026] Further preferably, when the slide valve 6 moves to the closed position, the middle part of the slide valve 6 forms a surface contact with the inner ring of the support body 2, thereby ensuring the sealing effect between them. Of course, a line contact can also be formed, but preferably, a surface contact is adopted.

[0027] As a further technical scheme, a limiting part is arranged at the top of the central shaft 4 to limit the movement position of the slide valve 5. Specifically, the diameter of the top of the central shaft 4 is designed to be larger than that of the shaft body part of the central shaft 4, that is, a spherical protrusion is formed at the top. When the slide valve 5 slides to the top position of the shaft body of the central shaft 4, the spherical protrusion can limit the position of the slide valve 5 to prevent the slide valve 5 from falling off the central shaft. In the present application, the slide valve 5 replaces the heart valve leaflet in the prior art, and the slide valve 5 is a whole structure. The slide valve 5 slides upward and downward as a whole, is located in the blood flow channel, and cooperates with the support body 2. By sliding the slide valve 5 upward and downward, whether the blood flows or not can be controlled, which is equivalent to controlling whether the valve leaflet in the prior art is opened or closed to control whether the blood flows or not. When the heart contracts, the slide valve 5 slides upward, the channel is opened, and the blood in the heart flows to the whole body through the aorta. At the same time, when the heart relaxes, the slide valve 5 can be closed in time to prevent the blood in the aorta from flowing back into the ventricle.

[0028] ​As a further technical solution, the bottom of the central shaft 4 is fixed with the support body 2, and further, the support body 2 in the embodiment includes a plurality of support units, the bottoms of the plurality of support units are connected together to form a containing space of the slide valve 5; further, as shown in Figure 1 each support unit is in an arc-shaped sheet or rod structure, the bottoms of the plurality of arc-shaped sheets or rod structures are connected together with the bottom of the central shaft 4 to realize the fixation of the central shaft 4 on the support body 2; for example, in the embodiment, four support units are arranged to surround the support body; the support body 2 can be made of at least one of a high polymer material, a biological tissue material and a tissue engineering material.

[0029] As a further technical solution, the upper and lower pressure relief rings 1 and 3 are fixed with the support body 2, the support body 2 is used to be connected at the original aortic valve, the upper and lower pressure relief rings 1 and 3 can be made of at least one of a high polymer material, a biological tissue material and a tissue engineering material, the upper pressure relief ring 1 can be directly arranged at the upper end outer ring of the support body 2, and the lower pressure relief ring 3 can be arranged at a position having a certain distance from the lower end of the support body 2, which can be designed according to actual conditions; in the embodiment, the principle of pressure relief of the upper and lower pressure relief rings 1 and 3 is that when the blood flows from the lower to the upper, if the lower pressure relief ring 3 is not arranged, the pressure of the blood will be applied on the slide valve 5, which causes the slide valve to bear a large pressure, and thus the slide valve is easily damaged; when the lower pressure relief ring 3 is arranged, the pressure of the blood can be borne by the slide valve 5 and the lower pressure relief ring 3, and thus the pressure applied on the slide valve 5 will be reduced, and thus the service life of the entire mechanical valve can be prolonged. Similarly, when the blood flows from the upper to the lower, if the upper pressure relief ring 1 is not arranged, the pressure of the blood will be applied on the slide valve 5, which causes the slide valve to bear a large pressure, and thus the slide valve is easily damaged; when the upper pressure relief ring 1 is arranged, the pressure of the blood can be borne by the slide valve 5 and the lower pressure relief ring 3, and thus the pressure applied on the slide valve 5 will be reduced, and thus the service life of the entire mechanical valve can be prolonged.

[0030] As a further technical solution, the central shaft 4 of the embodiment is fixed on the support body, and a spiral flow guide groove is arranged on the outer surface of the central shaft; a spiral flow guide groove is also arranged on the inner surface of the slide valve 5, the spiral flow guide groove is arranged to provide a static pressure environment for the slide valve and the central shaft, avoid unilateral adsorption stress of the slide valve, and thus provide an additional lubrication effect and increase the service life of the slide valve.

[0031] Finally, it should be noted that the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations.

[0032] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A reduced pressure mechanical valve, comprising: The device comprises an upper pressure relief ring, a lower pressure relief ring, a support main body, a central shaft and a sliding valve.

2. The reduced pressure mechanical flap of claim 1, wherein, The sliding valve is in the shape of a flying disc with thick middle and thin edges.

3. The reduced pressure mechanical flap of claim 1, wherein, A limiting part is arranged on the top of the central shaft to limit the movement position of the sliding valve.

4. The reduced pressure mechanical valve of claim 1, wherein, The pressure relief ring is in the shape of a hollow disc.

5. The mechanical pressure reducing valve of claim 1, wherein The support main body comprises a plurality of support units, the bottoms of which are connected together to form a space for accommodating the sliding valve.

6. The mechanical pressure reducing valve of claim 1, wherein The central shaft is fixed on the support main body and has a spiral flow guide groove on the outer surface.

7. The reduced pressure mechanical valve of claim 1, wherein, The sliding valve is made of at least one of high polymer material, biological tissue material and tissue engineering material.

8. The mechanical pressure reducing valve of claim 1, wherein, The sliding valve has a spiral flow guide groove on the inner surface.

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