One-way non-return device

Abstract

The invention discloses a one-way pass-stop return device which is mainly composed of a body, a main flow channel, side bays, weir islands and the like, and a plurality of side bays are machined on the two sides, along the center line of the main flow channel, of the main flow channel and are arranged in an up-down staggered mode or in a horizontally symmetrical mode. The fluid in the flow channel of the one-way non-return device can only normally flow in the set single direction and cannot normally flow in the opposite direction, for example, the fluid can only normally flow from the A direction to the B direction, and cannot normally flow from the B direction to the A direction (reverse flow is limited), namely, the flows and the flow speeds in different directions are different; a flow channel in the one-way non-return device can limit the retrograde movement of the fluid or at least limit the flow state and the flow speed of the fluid without adding any form of movable blocking part; the higher the flow speed of the fluid in the flow channel from the B direction to the A direction is, the stronger the non-return backflow effect of the fluid in the flow channel from the B direction to the A direction is.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and in particular to a one-way non-return device. Background Art

[0002] Gaseous fluids have amazing properties: they have no natural interfaces and are the only substances in nature that have the highest fluidity, the highest compressibility, and the highest expansibility.

[0003] Liquid fluids also possess amazing properties: although extremely soft, they are incompressible and are the only substances in nature with only one natural interface. Moreover, this natural interface is naturally horizontal.

[0004] Under natural conditions, the flow law of gaseous fluids is to flow in the direction of lower pressure; the flow law of liquid fluids must succumb to the force of gravity. As the saying goes, "water flows to the lowest place", it can be seen that the downward flow of liquid fluids is a common phenomenon.

[0005] It is hoped that the properties of these materials can be used to invent, design and manufacture suitable one-way non-return devices to serve mankind.

[0006] Fluids can typically flow in two opposite directions within a flow tube. To restrict the flow direction, a fixed or movable barrier is typically installed. However, the one-way, non-returnable device described herein does not incorporate any movable barrier components, making it a unique flow tube distinct from conventional tubes. Summary of the Invention

[0007] In the prior art, fluids can typically flow in two opposite directions within a flow tube, with the flow rate being equal in either direction. To restrict the flow direction and flow rate, a fixed or movable barrier component is typically installed. The present invention provides a one-way, non-return device without any movable components to address these issues.

[0008] In one aspect, the present invention provides a one-way, non-returnable device comprising a main body, a main channel, side bays, and a weir island. The device is characterized in that the main channel is provided with a plurality of side bays along its centerline, arranged in a vertically staggered or horizontally symmetrical manner. The side bays are primarily located in the middle section of the main channel.

[0009] According to a one-way non-return device provided by the present invention, the maximum angle between the inner shoreline 1-21 of the side bay and the centerline of the main channel is ≤80 degrees, preferably 10 degrees to 75 degrees.

[0010] According to a one-way non-return device provided by the present invention, the cross section of the body including the main channel and the side bay can be rectangular, circular, annular or other polygonal.

[0011] On the other hand, the present invention also provides a one-way non-return device, including a main body, a main channel, a side bay, and a weir island; the flow cross-sectional area of the upper main channel is larger than the flow cross-sectional area of the lower main channel.

[0012] According to the one-way non-return device provided by the present invention, the flow cross-sectional area of the upper main flow channel may also be equal to or smaller than the flow cross-sectional area of the lower main flow channel.

[0013] The present invention also provides a one-way, non-returnable device comprising a main body, a main channel, side bays, and barrier islands. The main channel has a plurality of barrier islands disposed along its centerline, the barrier islands being arranged diagonally and staggered vertically or horizontally symmetrically, preferably staggered vertically. Just as the side bays are primarily located in the middle section of the main channel, the barrier islands are also primarily located in the middle section.

[0014] According to a one-way non-return device provided by the present invention, the length of the oblique extension of the weir island exceeds half the width of the main channel, and the orthographic projection of its tail overlaps with the orthographic projection of the tail of the weir island on the other side of the center line of the main channel.

[0015] According to a one-way non-return device provided by the present invention, the maximum angle between the obliquely arranged weir island and the center line of the main channel is ≤80 degrees, preferably 10 degrees to 75 degrees.

[0016] According to a one-way non-return device provided by the present invention, the flow outlet adopts the vertical height difference of two weir islands staggered up and down to set the vertical flow outlet; the flow outlet can also adopt a horizontal flow outlet, preferably the vertical flow outlet adopts the vertical height difference of two weir islands staggered up and down to set the vertical flow outlet.

[0017] The one-way non-return device provided by the present invention has the following characteristics: (1) The fluid in the flow channel of a one-way non-return device can only flow normally in a single set direction and cannot flow normally in the opposite direction. For example, it can only flow normally from A to B, but cannot flow normally from B to A (reverse flow is restricted) - the flow rate and flow rate in different directions are different; (2) The flow passage in the one-way non-return device is not equipped with any form of movable blocking parts to limit the reverse flow of the fluid or at least limit its flow pattern and flow rate; (3) The higher the flow velocity of the fluid from B to A in the flow channel, the stronger the effect of preventing backflow from B to A. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a cross-sectional view of the structural diagram provided by the present invention; Figure 2 It is a side view provided by the present invention.

[0020] Reference numerals: Serial number: 1. Main body; 1-0. Centerline of main channel; 1-1. Main channel; 1-2. Side bay; 1-21. Inner shoreline of side bay; 1-1-1. Diversion outlet; a. Boundary point; 2. Inlet; 3. Island; 3-1. Streamfacing surface; 3-2. Outlet; 4. Outlet; 5. Cover plate. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] The following combination Figure 1-Figure 2 The one-way non-return device of the present invention is described.

[0023] Figure 1 It is a cross-sectional view of the structural diagram provided by the present invention; Figure 2 It is a side view provided by the present invention; For the convenience of explanation and easy understanding, the description is based on the flow of fluid from A to B (forward), while also taking into account the flow from B to A (retrograde).

[0024] Figure 1 、 Figure 2 As shown, the body 1 is generally a rectangular three-dimensional body, but can also be a cylindrical or other three-dimensional body. The interior of the body is a hollow main channel 1-1, with a fluid inlet 2 processed on the top and a fluid outlet 4 processed on the bottom.

[0025] Figure 1 、 Figure 2The main channel center line 1-0 shown is a process virtual line, which serves as an orientation reference for the illustrated structure, such as the left side, right side, both sides, upper left, lower right, etc., to facilitate the explanation of the structure and working principle of the device and facilitate understanding of the present invention.

[0026] For ease of presentation, the main channel 1-1 can be divided from top to bottom into three sections: upper, middle, and lower. The upper section of the main channel extends from the inlet 2 or the upper surface of the one-way non-return device to the first weir island 3 or boundary point a. Boundary point a is actually the intersection of the upper surface of the first weir island 3, or the flow-facing surface 3-1, and the centerline 1-0 of the main channel. The middle section of the main channel extends from the first weir island 3 or boundary point a to the bottom of the diverter 1-1-1 or the last side bay 1-2. Along the main channel centerline, the main channel has several weir islands 3, along with several side bays 1-2. The lower section of the main channel extends from the bottom of the diverter 1-1-1 or the last side bay 1-2 to the outlet 4 or the lower surface of the one-way non-return device. The inner wall of the lower section is smooth. Compared to the middle section, the upper and lower sections of the main channel are shorter.

[0027] Side bays 1-2 and weir island 3 complement each other. In other words, due to the fluid's flow characteristics, weir islands are required in the main channel to constrain the fluid's flow pattern, thereby achieving the design goal of a one-way, non-return device. The installation of weir islands, along with the corresponding side bays, further facilitates constraining the fluid's flow pattern.

[0028] In terms of the cross-sectional area of the main flow channel, the upper section of the main flow channel has a larger cross-sectional area than the lower section. This allows for both greater fluid pressure and greater fluid gravity to be utilized. Of course, the cross-sectional area of the upper section of the main flow channel can also be equal to or smaller than the cross-sectional area of the lower section of the main flow channel; however, the preferred technical solution is for the cross-sectional area of the upper section of the main flow channel to be larger than the cross-sectional area of the lower section of the main flow channel.

[0029] Because weir islands 3 on either side of the middle main channel extend obliquely toward the main channel centerline 1-0, the flow cross-sectional area fluctuates. The fluid flow pattern in the middle main channel is not completely vertical, but rather zigzags left and right. The fluid velocity in the middle main channel also appears to be lower than that in the upper and lower main channels. Therefore, the middle main channel is typically longer than the upper and lower main channels to provide more inertia.

[0030] like Figure 1 As shown, the side bays 1-2 are structures that can be directly machined onto the main body 1. They resemble a spoon standing on its side and are actually an area partially surrounded by upper and lower weir islands 3. The side bays 1-2 have a certain volume and are arranged on both sides of the main channel at a certain angle to the main channel centerline 1-0.

[0031] Side bay 1-2 can be Figure 1As shown, they are arranged in a staggered manner on both sides of the middle main channel, or they can be arranged horizontally symmetrically on both sides of the middle main channel, and are exactly the same from top to bottom and left to right, which is commonly known as "mirror image".

[0032] But the preferred technical solution is of course Figure 1 As shown, the side bays 1-2 on both sides of the middle main channel are arranged in a staggered manner, that is, when the position of the side bay 1-2 on one side of the middle main channel, for example, the left side, is at a certain height, the position of the side bay 1-2 on the right side should be higher or lower than the position of the side bay 1-2 on the left side. Figure 1 The vertically staggered arrangement shown can provide a larger and more reasonable margin for the arrangement of the barrier islands 3. If the barrier islands are arranged horizontally and symmetrically, such advantages cannot be achieved.

[0033] The obliquely arranged inner bank line 1-21 of the side bay is actually the lower surface of the barrier island 3, and forms a certain angle with the center line 1-0 of the main channel; however, the maximum angle is no more than 80 degrees. The preferred technical solution is that the angle with the center line 1-0 of the main channel is 10 degrees to 75 degrees.

[0034] Figure 1 The angle shown is merely an optional illustration and does not constitute any limitation on the angle between the inner bank line 1-21 of the side bay and the center line 1-0 of the main channel. In other words, the angle between the inner bank line 1-21 of the side bay and the center line 1-0 of the main channel can be freely selected to an appropriate threshold value as needed to facilitate fluid movement.

[0035] like Figure 1 As shown, several barrier islands 3 are installed on both sides of the middle main channel. These islands are typically rectangular, but can be regular, irregular, or other polygonal shapes composed of flat and curved surfaces. These islands act as guides that divide the flow in the middle main channel into two parts, constraining the flow pattern.

[0036] Yandao 3 can be used as Figure 1 As shown, they are arranged in a staggered manner on both sides of the main channel center line; they can also be arranged horizontally symmetrically on both sides of the main channel center line (not shown in the figure), exactly the same up and down and left and right, which is commonly known as "mirror image".

[0037] But the preferred technical solution is of course the weir island 3 Figure 1 As shown, they are arranged in an up and down staggered manner along both sides of the middle main channel, that is, when the position of the weir island 3 on one side of the middle main channel, for example, the left side, is at a certain height, the position of the weir island 3 on the right side of the middle main channel should be higher or lower than the position of the weir island 3 on the left side.

[0038] The barrier islands 3 are arranged along both sides of the middle section of the main channel, arranged obliquely, forming a funnel shape, and extending obliquely toward the center line 1-0 of the main channel.

[0039] The lower part of the weir island 3 extending obliquely toward the center line 1-0 of the main channel can be Figure 1 The length of the oblique extension shown crosses the centerline of the main channel, but it does not necessarily need to cross the centerline. "Crossing the centerline" means that the length of the barrier island 3 actually exceeds half (1 / 2) the width of the middle main channel, extending to the other side of the centerline. The preferred technical solution is, of course, for the barrier island 3 to extend beyond half (1 / 2) the width of the main channel, forming a structure with overlapping orthographic projections.

[0040] The lower half of the weir island 3 extending obliquely downward, i.e., its tail, is shaped like a bird's beak or a fish's mouth and is relatively smooth, which is obviously more conducive to the forward flow of the fluid.

[0041] Specifically, on one side of the main channel, for example, the barrier island 3 on the left side extends to the right by more than half the main channel width, and the barrier island 3 on the right side also extends to the left by more than half the main channel width. However, the main channel width is limited and cannot accommodate barrier islands 3 of the same height on both sides of the main channel. Moreover, the diagonal extension lengths of the barrier islands 3 on both sides of the main channel each exceed half the main channel width. As a result, the barrier islands 3 are staggered vertically, causing the tails of the staggered and diagonally extending barrier islands 3 on both sides of the main channel to overlap with each other through their orthographic projections across the main channel centerline. The orthographic projections mentioned here refer to orthographic projections from top to bottom or bottom to top.

[0042] The overlapping orthographic projections of the tails of barrier islands 3 are actually overlapping orthographic projections. This is a structural phenomenon caused by the overlapping orthographic projections of two staggered barrier islands 3, one above the other. The overlapping orthographic projections mean that the orthographic projection of the upper barrier island 3 "covers" the orthographic projection of the lower barrier island 3. Alternatively, the orthographic projection of the upper barrier island 3 is "covered" by the orthographic projection of the lower barrier island 3.

[0043] If the barrier islands 3 on either side of the main channel extend obliquely toward the main channel centerline, and each exceeds half the main channel width or crosses the main channel centerline, the lengths of the barrier islands 3 on both sides are essentially equal. Therefore, the overlapping orthographic projections of the barrier islands 3 in this situation are called equal-length combined overlap.

[0044] If the barrier islands 3 on either side of the main channel extend diagonally toward the main channel centerline and clearly exceed half the channel width or cross the main channel centerline, while the barrier islands 3 on the other side also extend diagonally but do not exceed the main channel centerline, the lengths of the barrier islands 3 on both sides are unequal. Therefore, the orthographic overlap of the barrier islands 3 in this situation is called unequal-length combined overlap.

[0045] This means that the lengths of barrier islands 3 can be equal or unequal, and the overlapping orthographic projections of the tails of barrier islands can be formed by either equal or unequal length combinations. In short, the overlapping orthographic projections of the tails of barrier islands can be formed by either equal or unequal length combinations. In short, whether the lengths of barrier islands 3 on the left or right are equal or unequal, their orthographic projections must overlap.

[0046] The most significant characteristic of the overlapping orthographic projections of the diagonally extending lower halves of barrier island 3 is that the reverse-flowing fluid is blocked by the overlapping portion formed by the tails of the upper and lower barrier islands. This prevents the fluid from easily flowing upward through the main channel. Instead, it changes direction at flow outlet 3-2, formed by the vertical height difference, and flows into side bay 1-2. This demonstrates that the overlapping tails of barrier island 3 effectively prevent reverse-flow from entering the one-way, non-returnable device.

[0047] Moreover, the weir islands 3 on both sides of the middle main channel are arranged in an up-down staggered manner, which can more reasonably arrange the vertical flow outlet 3 - 2 between the upper and lower weir islands 3 .

[0048] The functional surfaces of the weir island 3 are mainly the upper and lower surfaces, which are related to the flow state and movement direction of the fluid and can affect the fluid movement situation: when the fluid flows from A to B, that is, in the forward direction, the upward side of the weir island 3 will bear the impact of the fluid and guide the fluid movement, so it is called the headwater surface (also called the flow-connecting surface) 3-1, and the downward surface is the inner shoreline 1-21 of the side bay.

[0049] The flow-facing surface 3 - 1 of the weir island 3 is usually a smooth surface, which is conducive to the flow of fluid from A to B.

[0050] The weir island 3 forms a certain angle with its frontal surface 3-1 and the main channel centerline 1-0. The maximum angle between the weir island 3 and the main channel centerline 1-0 is no greater than 80 degrees. The preferred technical solution is that the angle between the frontal surface 3-1 and the main channel centerline 1-0 is 10 degrees to 75 degrees.

[0051] Fluid enters the upper main channel from inlet 2 and flows downstream into the middle main channel. The fluid is restrained by the long weir islands 3, sliding toward the incoming surface 3-1 of the weir island 3 on one side of the middle main channel and continuing to flow downward. It is then pushed back to its original side by the incoming surface 3-1 of the weir island 3 on the opposite side of the main channel.

[0052] For forward-flowing fluid, the horizontally symmetrical arrangement of the barrier islands 3 along either side of the mid-mainstream channel generally facilitates fluid flow. However, this horizontally symmetrical arrangement naturally creates a weak zone running from bottom to top around the centerline of the mid-mainstream channel. Without overlapping sections, it is difficult to effectively block reverse-flowing fluid. For reverse-flowing fluid, especially one with a certain pressure, the horizontally symmetrical arrangement of the barrier islands 3 along either side of the mid-mainstream channel creates a structural resistance that is virtually unusable. Reverse-flowing fluid at a certain pressure can easily break through this weak zone, clearly hindering reverse flow prevention.

[0053] The relative weir islands 3 staggered up and down on both sides of the middle main channel form a channel allowing fluid to pass through, which is called a flow outlet.

[0054] If the weir islands 3 are arranged symmetrically on both sides of the center line 1-0 of the middle main channel, the extension length of the two opposite weir islands 3 will not exceed half of the main channel, the flow outlet will be horizontal, and the flow outlet width can be large or small, and the selectivity is usually large.

[0055] Even if they are staggered up and down along both sides of the main channel, the length of the weir islands 3 on both sides does not exceed half of the main channel, so the flow outlet design can be either horizontal or slightly inclined, and the selectivity of the flow outlet width is also relatively large.

[0056] Although an excessively wide horizontal flow port provides better flowability for the forward-flowing fluid, it will affect the anti-backflow effect for the reverse-flowing fluid.

[0057] The flow outlet generally adopts a vertical flow outlet form, that is, the vertical flow outlet 3-2 is set by using the vertical height difference of two weir islands 3 staggered up and down, which corresponds to the reverse flow and will of course have a better anti-backflow effect.

[0058] In short, the flow outlet can be set as a vertical flow outlet with a vertical height difference between two weir islands 3 staggered up and down, or a horizontal flow outlet; but the preferred technical solution is to set a vertical flow outlet 3-2 with a vertical height difference between two weir islands 3 staggered up and down.

[0059] like Figure 1 As shown, the diversion port 1-1-1 is both a discharge port for the fluid to flow from direction A to direction B (forward) and out of the outlet 4, and a diversion port for the fluid to flow from direction B to direction A (reverse).

[0060] Figure 1 As shown, the function of the diversion port 1-1-1 is that when the fluid flows in the reverse direction from B to A, the fluid is split by the weir island 3, forming several obvious vertical tributaries. Therefore, most of the fluid is forced to flow into the side bay, and only a small part of the fluid can flow in the reverse direction into the middle main channel.

[0061] The horizontal widths of the flow channels at the diversion port may be equal or unequal.

[0062] The cover plate 5 is a sealing plate to prevent fluid leakage. If the one-way non-return device is printed as a whole using a 3D printing method, the cover plate is usually not required, which will be more effective in preventing fluid leakage.

[0063] Due to drawing limitations, the cross-section of the one-way non-return device is not shown in the figure. In fact, the cross-section of the main body of the one-way non-return device, including the main channel 1-1, the side bays 1-2, and the weir island 3, can be rectangular, circular, annular, or other polygonal.

[0064] According to the general rules of reading diagrams, the top, bottom, left, right and Figure 2 The various schematic diagrams shown are only for reference to facilitate understanding and do not constitute any limitation.

[0065] How it works 1. Working principle of flow from A to B Figure 1 As can be seen, the two thick arrows A and B represent the direction of fluid movement. The fluid enters the upper main channel from inlet 2, that is, it flows from A to B and from top to bottom, which is called forward flow; When the fluid enters the upper main channel from inlet 2 and flows downward, the fluid with a larger cross-sectional area (flow rate) is constrained by the upper main channel and cannot flow to both sides.

[0066] The fluid continues to flow downward into the middle main channel. Due to its inertia, the forward-flowing fluid flows at a near-vertical acceleration. Furthermore, due to the constraints of the weir islands 3 on both sides, the fluid velocity is likely to increase, preventing it from entering the side bays 1-2. Ultimately, the fluid may be discharged from outlet 4 at a higher velocity than its initial downward velocity.

[0067] 2. Working principle of flow from B to A like Figure 1 As shown, when the fluid enters the lower main channel from the outlet 4, it flows from B to A and from bottom to top, which is called retrograde flow.

[0068] Figure 1 As shown in Figure 1, when the fluid flows in the reverse direction from direction B to direction A, the upward-flowing fluid is cut and diverted by the weir island 3, forming a distinct vertical laminar flow. As a result, the vast majority of the fluid is forced to flow into the side bay, and only a small portion of the reverse-flowing fluid can directly enter the middle main channel.

[0069] The amount of fluid that flows retrogradely into the mid-section main channel is small and will be diverted again.

[0070] This process happens again and again, and the amount of retrograde fluid replenished upstream becomes less and less. After multiple diversions, the retrograde fluid is eventually completely blocked.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A one-way non-return device, mainly composed of a main body, a main channel, a side bay, a weir island, etc., characterized by: A plurality of weir islands are arranged on both sides of the center line of the main channel. The weir islands are arranged obliquely and in a staggered manner or in a horizontally symmetrical manner.

2. A one-way non-return device according to claim 1, characterized in that: The length of the barrier island extending obliquely exceeds half the width of the main channel, and the orthographic projection of its tail overlaps with the orthographic projection of the tail of the barrier island on the other side of the main channel.

3. The one-way non-return device according to claim 1, characterized in that: The orthographic projections of the tail of the barrier island overlap with each other, which can be either equal-length combinations or unequal-length combinations.

4. The one-way non-return device according to claim 1, characterized in that: The maximum angle between the obliquely arranged weir island and the center line of the main channel is ≤80 degrees.

5. The one-way non-return device according to claim 1, characterized in that: The outlet is set up as a vertical outlet with a vertical height difference between two weir islands staggered up and down; the outlet can also be a horizontal outlet.

6. A one-way non-return device mainly composed of a main body, a main channel, a side bay, a weir island, etc., characterized by: The flow cross-sectional area of the upper main flow channel is greater than the flow cross-sectional area of the lower main flow channel.

7. The one-way non-return device according to claim 6, characterized in that: The flow cross-sectional area of the upper main flow channel may also be equal to or smaller than the flow cross-sectional area of the lower main flow channel.

8. A one-way non-return device, mainly composed of a main body, a main channel, a side bay, a weir island, etc., characterized by: The main channel is processed with a number of side bays on both sides of the center line of the main channel, which are arranged in a vertically staggered manner or in a horizontally symmetrical manner.

9. The one-way non-return device according to claim 8, characterized in that: The maximum angle between the inner shoreline of the side bay and the centerline of the main channel is ≤80 degrees.

10. The one-way non-return device according to claim 8, characterized in that: The cross section of the main body including the main channel, side bays and barrier islands can be rectangular, circular, annular or other polygonal.

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