Conical check valve with elastic structure

Abstract

The invention discloses a conical check valve with an elastic structure. The conical check valve comprises a valve clack, a valve body 1, a valve body 2 and an annular elastic pressing piece. The valve clacks are in an open state when being separated so that fluid can pass through, and are in a closed state when being gathered so that the fluid can be prevented from passing through. The valve body 1 is provided with cylindrical clamping grooves which are equal to the valve clacks in number and used for being connected with the valve clacks. The annular elastic pressing sheet is mounted between the valve body 1 and the valve body 2, and a plurality of elastic pressing sheets extend out of the inner diameter of the annular elastic pressing sheet, so that the valve clack is in a completely closed state in a non-working state; the valve body 1 and the valve body 2 are connected through screws, and a flow channel for fluid to flow in the valve body 1 and the valve body 2 is streamlined. The check valve can adapt to the application scene of high-pressure fluid and has low fluid resistance and water hammer pressure, meanwhile, the rotating stroke of the valve clack is reduced, and rapid dynamic response of the check valve is achieved.

Description

Technical Field

[0001] This invention belongs to the field of check valve technology, and specifically relates to a conical check valve with an elastic structure. Background Technology

[0002] A check valve is a valve used to prevent the backflow of fluid. Also known as a one-way valve, reverse valve, or non-return valve, it is widely used in various fluid systems, including hydraulic engineering, petrochemicals, power generation, pharmaceuticals, food processing, and other fields. The basic principle of a check valve is to design its valve structure so that it automatically opens when the flow is in the forward direction and quickly closes when the flow is in the reverse direction, preventing the medium from flowing backward.

[0003] In existing technology, check valves can be classified into lift check valves, swing check valves, and butterfly check valves according to their structure. Their working principles are similar: when the medium flows in the specified direction, the valve disc is opened by the force of the medium; when the medium flows backward, the valve disc closes due to its own weight and the reverse force of the medium, thus preventing backflow. However, each of these three types of check valves has its own shortcomings: lift check valves have a tortuous internal flow channel, resulting in significant fluid resistance; swing check valves have a longer valve disc travel distance from fully open to closed than most check valves, resulting in a longer closing time, and because the valve disc is suspended in the fluid, it is prone to water hammer; butterfly check valves, due to their simple structure, have poor sealing performance and are not suitable for high-pressure fluid applications. Summary of the Invention

[0004] To address the problems described in the background art, the present invention aims to provide a conical check valve with an elastic structure. This check valve features an annular elastic pressure plate on the valve disc, functioning as a torsion spring, which helps reduce water hammer pressure generated during valve opening and closing. Simultaneously, the streamlined flow channel for fluid flow effectively reduces flow resistance. Furthermore, the designed valve disc is pyramidal in its fully closed state; during opening and closing, the valve disc only needs to rotate the angle between the height and side of the pyramid to fully open or abut against other valve discs to form a sealed surface, thereby reducing the valve disc's travel distance and closing time. Finally, by adding a layer of rubber at the top and side abutments of the valve disc, the sealing performance of the sealed surface is improved, and reinforcing ribs on the inner surface of the valve disc increase its strength, making it suitable for high-pressure applications.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The purpose of this invention is to disclose a conical check valve with an elastic structure, which consists of several valve discs, an annular elastic pressure plate, valve body 1 and valve body 2.

[0007] The valve disc is generally triangular prism-shaped with a cylindrical bottom. The bottom can connect to the cylindrical groove inside the valve body 1 and can rotate. When the fluid flows from the bottom to the top of the valve disc through the flow channel, the valve discs separate under the impact of the flowing fluid, allowing the fluid to flow through the flow channel with minimal fluid resistance. When the fluid flows from the top to the bottom of the valve disc, the fluid will drive the valve disc to rotate in the direction of the axis of the flow channel, causing several valve discs to converge and form a sealed surface, thereby blocking the flow channel and achieving the purpose of reverse flow prevention.

[0008] Furthermore, in the fully closed state, the sealing surface of the valve disc is pyramidal. Therefore, during the closing rotation of any valve disc, only the angle between the height and side of the pyramid needs to be rotated to abut against other valve discs and form a sealing surface, reducing the rotation stroke of the valve disc and shortening the valve disc closing time. Similarly, during the opening process of any valve disc, the reduced rotation stroke also contributes to rapid opening, thereby achieving a rapid dynamic response for opening and closing. Simultaneously, the pyramidal shape of the valve disc when closed is also beneficial for manufacturing. Only a pyramidal structure with a cylindrical base needs to be machined, and then the valve discs can be obtained by cutting along the edges of the pyramidal structure. Since all valve discs originate from the side of the same pyramidal structure, they have a high degree of fit and high sealing performance when closed, improving stability. Furthermore, when the fluid flows in the direction of flow, the greater the fluid pressure borne by the pyramidal sealing surface, the tighter the contact between the valve discs, resulting in higher sealing performance. Therefore, this check valve core has the performance to adapt to high-pressure fluid applications.

[0009] Furthermore, the valve disc is made of stainless steel, and each valve disc has reinforcing ribs on its inner surface, which not only improves the structural strength and stability of the valve disc but also helps extend its service life. Simultaneously, a layer of rubber is added to the top of the valve disc and the contact area between the valve disc and its adjacent sides. Rubber is a polymer material with excellent elasticity and corrosion resistance; it deforms significantly under relatively small pressure. This deformation provides contact pressure, compensates for the gap between the valve disc contact surfaces, and further enhances the sealing effect.

[0010] Furthermore, the annular elastic pressure plate is circular in shape, with several elastic pressure plates extending from its inner diameter. The initial angle of the elastic pressure plates is smaller than the angle when the valve disc is fully closed, so that it presses tightly against the outer surface of the valve disc, ensuring that the valve disc is fully closed when not in operation. This structure, which does not rely on gravity for closure, allows the check valve to be installed horizontally or vertically when the fluid should flow from bottom to top.

[0011] Furthermore, the annular elastic pressure plate is installed between valve body 1 and valve body 2, and the number of its elastic pressure plates is consistent with the number of valve discs.

[0012] Furthermore, the valve body 1 contains several cylindrical slots that are connected end to end to form a regular polygon, which locks the cylinder at the bottom of the valve disc to achieve coaxial cooperation. Moreover, when all valve discs are installed, the movement of all valve discs along the axis of the cylindrical slot is fixed, and they can only rotate around the axis of the cylindrical slot.

[0013] Furthermore, the number of cylindrical slots is the same as the number of valve discs.

[0014] Furthermore, valve body 1 and valve body 2 are fastened together by several screws, and the internal flow channel for fluid flow is streamlined. During the opening process of the check valve, several valve discs separate from each other under the impact of the fluid, and since each valve disc is subjected to an equal load and is symmetrical, the check valve can effectively reduce fluid resistance.

[0015] The beneficial effects of this invention are:

[0016] The valve disc of the present invention is pyramidal in the fully closed state. Therefore, during the opening and closing rotation of the valve disc, only the height and side angle of the pyramid need to be rotated to fully open or abut against other valve discs to form a sealing surface, thereby reducing the movement stroke of the valve disc and reducing the closing time.

[0017] The valve disc material used in this invention is stainless steel, and each valve disc is cut from the same pyramidal structural component. Furthermore, the inner surface of the valve disc is reinforced with ribs to ensure structural strength and sealing performance when the valve disc is closed. A layer of rubber is added at the contact point between the top of the valve disc and the adjacent side of the valve disc, further sealing the valve disc and enabling this check valve to be suitable for high-pressure fluid applications.

[0018] The annular elastic pressure plate, which acts as a torsion spring, provided on the outer surface of the valve disc in this invention helps to reduce the water hammer pressure generated when the valve is opened and closed. At the same time, the internal flow channel for fluid flow is streamlined, which can effectively reduce flow resistance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional view of the check valve of the present invention when it is fully closed.

[0021] Figure 2 This is a cross-sectional view of the check valve of the present invention (excluding valve body 2) when fully open;

[0022] Figure 3 This is a top view of the check valve of the present invention when it is fully closed;

[0023] Figure 4 This is a schematic diagram of the valve disc structure;

[0024] Figure 5 The top view and sectional view of valve body 1 are shown.

[0025] Figure 6 This is a schematic diagram of the structure of a ring-shaped elastic pressure plate;

[0026] In the diagram: 10. Valve disc; 11. Rubber groove; 12. Reinforcing rib; 20. Valve body 1; 21. Cylindrical groove; 30. Valve body 2; 40. Annular elastic pressure plate; 50. Flow channel. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] See Figure 1 , Figure 2 and Figure 4 This invention proposes a conical check valve with an elastic structure, mainly comprising several valve discs 10, valve bodies 20 and 30, and annular elastic pressure plates 40. The valve discs 10 are generally triangular prisms with a cylindrical bottom, which can connect to and rotate within the cylindrical groove 21 inside the valve body 1. Specifically, in this embodiment, the number of valve discs 10 is preferably at least three. When fluid flows from the bottom to the top of the valve discs 10 through the flow channel 50, the valve discs 10 separate under the impact of the flowing fluid, allowing the fluid to flow through the flow channel 50 with minimal resistance. When fluid flows from the top to the bottom of the valve discs 10, the fluid drives the valve discs to rotate along the axis of the flow channel 50, causing the valve discs 10 to converge and form a sealed surface, thereby blocking the flow channel 50 and achieving reverse flow prevention.

[0029] Preferably, see Figures 1 to 3Furthermore, in the fully closed state, the sealing surface of the valve disc 10 is pyramidal. Therefore, during the closing rotation process, any valve disc 10 only needs to rotate the height and side angle of the pyramid to abut against other valve discs 10 and form a sealing surface, reducing the rotation stroke of the valve disc 10 and shortening the closing time. Similarly, during the opening process, the reduced rotation stroke of any valve disc 10 also contributes to rapid opening, thereby achieving a rapid dynamic response for opening and closing. Meanwhile, the pyramidal shape of the valve disc 10 when closed is also beneficial for manufacturing. That is, only a pyramidal structure with a cylindrical base needs to be machined, and then the valve disc 10 can be obtained by cutting along the edge of the pyramidal structure. Since all the valve discs 10 come from the side of the same pyramidal structure, they have a high degree of fit and high sealing performance when closed, which improves stability. Furthermore, when the fluid flows, the greater the fluid pressure on the pyramidal sealing surface, the tighter the contact between the valve discs 10 will be, resulting in a higher sealing performance of the sealing surface. Therefore, this check valve has the performance to adapt to high-pressure fluid applications.

[0030] Preferably, see Figure 3 and Figure 4 The valve disc 10 is made of stainless steel, and each valve disc 10 has reinforcing ribs 12 machined on its inner surface. This not only further improves the structural strength and stability of the valve disc 10 but also helps extend its service life. Simultaneously, rubber grooves 11 are machined at the top of the valve disc 10 and the contact points with adjacent sides. A layer of rubber is added to the rubber grooves 11, and then cut with a tool. Rubber is a polymer material with excellent elasticity and corrosion resistance; it deforms significantly under relatively small pressure. This deformation provides contact pressure, compensates for the gap between the valve disc contact surfaces, and further enhances the sealing effect.

[0031] Preferably, see Figure 3 and Figure 6The annular elastic pressure plate 40 is circular in shape, with several elastic pressure plates extending from its inner diameter. The initial angle of the elastic pressure plates is smaller than the angle when the valve disc 10 is fully closed, pressing it tightly against the outer surface of the valve disc 10, ensuring that the valve disc 10 is fully closed when not in operation. This gravity-free closing structure allows the check valve to be installed horizontally or vertically when the fluid should flow from bottom to top. Furthermore, the annular elastic pressure plate 40, acting as a torsion spring, is positioned at the valve disc 10. When the thrust on the valve disc 10 generated by the inlet fluid pressure exceeds the clamping force of the elastic pressure plate, the annular elastic pressure plate 40 deforms, opening the valve disc. The higher the fluid pressure, the greater the valve opening. Conversely, when the fluid pressure decreases, the annular elastic pressure plate 40 deforms and returns to its original shape, pushing the valve disc to close the valve. Due to the action of the annular elastic pressure plate 40, the closing time of the valve disc 10 is reduced, the dynamic response is accelerated, and the water hammer pressure generated during valve opening and closing is also reduced.

[0032] Preferably, see Figure 1 and Figure 6 The annular elastic pressure plate 40 is installed between the valve body 20 and the valve body 30, and the number of its elastic pressure plates is consistent with the number of valve discs 10, and should be no less than 3.

[0033] Preferably, see Figure 5 The valve body 20 is used to install the valve discs 10 and connect them to the valve body 30. The valve body 20 has an equal number of cylindrical slots 21 as the number of valve discs 10. These cylindrical slots 21, connected end-to-end, form a regular polygon, securing the cylinder at the bottom of the valve disc 10 for coaxial engagement. Furthermore, once all valve discs 10 are installed, their movement along the axis of the cylindrical slots 21 is fixed, allowing them to rotate only around the axis of the cylindrical slots 21. The valve body 20 also has several threaded holes for connection to the valve body 30 using screws.

[0034] Preferably, see Figure 1 , Figure 2 The valve body 1 and valve body 2 are fastened together by several screws, and the internal flow channel 50 for fluid flow is streamlined. In addition, several valve discs 10 are installed inside the valve body 1. During the opening of the check valve, the several valve discs 10 separate from each other under the impact of the fluid and are symmetrical. Therefore, the check valve can effectively reduce fluid resistance.

[0035] Working principle of the invention:

[0036] When fluid flows from valve body 1 to valve body 2 through the flow channel 50, the valve discs 10 overcome the clamping force of the annular elastic pressure plate 40 under the impact of the fluid, thus separating from each other, allowing the fluid to flow through the flow channel 50 with minimal fluid resistance. When fluid flows from valve body 2 to valve body 1, the fluid will drive the valve discs to rotate in the axial direction of the flow channel 50, causing several valve discs 10 to converge and form a sealed surface, thereby blocking the flow channel 50 and achieving the purpose of reverse flow prevention.

[0037] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A conical check valve with a resilient structure, characterized by: The check valve mainly includes several valve discs (10), valve body 1 (20), valve body 2 (30), and annular elastic pressure plate (40). The valve body 1 (20) is provided with cylindrical slots (21) equal in number to the valve discs (10). The annular elastic pressure plate (40) is pressed between the valve body 1 (20) and the valve body 2 (30).

2. A conical check valve with an elastic structure according to claim 1, characterized in that: The valve disc (10) is generally triangular prism-shaped with a cylindrical bottom. The sealing surface of the valve disc (10) in the fully closed state is pyramidal.

3. A conical check valve with an elastic structure according to claim 2, characterized in that: The valve disc (10) is made of stainless steel, and preferably there are at least three of them.

4. A conical check valve with an elastic structure according to claims 2 and 3, characterized in that: Rubber grooves (11) are opened at the top of the valve disc (10) and at the contact point between the valve disc (10) and the adjacent side of the valve disc (10), and a layer of rubber is added. Reinforcing ribs are processed on the inner surface of the valve disc (10).

5. A conical check valve with an elastic structure according to claim 1, characterized in that: The cylindrical slots (21) are connected end to end to form a regular polygon.

6. A conical check valve with an elastic structure according to claim 1, characterized in that: The annular elastic pressure plate (40) is circular in shape, with several elastic pressure plates extending from its inner diameter, the number of which is equal to the number of valve discs.

7. A conical check valve with an elastic structure according to claims 1 and 6, characterized in that: The initial angle of several elastic plates of the annular elastic pressure plate (40) is smaller than the angle when the valve disc is fully closed.

8. A conical check valve with an elastic structure according to claim 1, characterized in that: The flow channels (50) for fluid flow inside the valve body 1 (20) and valve body 2 (30) are streamlined. The bottom of the valve disc (10) can be connected to the cylindrical slot (21) on the valve body 1 (20) and can rotate relative to it.

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