Fluid circulation system

Abstract

The invention discloses a fluid circulation system which is mainly composed of an equivalent pressure cabin, a controllable pumping pressure device or a controllable propelling device, a built-in through-flow pipe, an outboard valve, a backflow guide pipe and the like. The outboard valve is an independent one-way valve or an independent switch valve or a combination of the two valves. A controllable pumping pressure device or a controllable propelling device in the equivalent pressure cabin is connected with a built-in through-flow pipe, and the built-in through-flow pipe is connected with the equivalent pressure cabin or connected with a backflow guide pipe outside the equivalent pressure cabin. The controllable pumping pressure device or the controllable propelling device can be used independently and can also be used in combination with a built-in valve. The controllable propelling device comprises an electromagnetic propelling device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid circulation, in particular to a gaseous fluid or gas-liquid fluid circulation system. The circulation system of gaseous fluid refers to that there is only gaseous fluid in the pressure cabin, and the so-called gaseous fluid can be monomolecular gas or multicomolecular gas. The circulation system of gas-liquid fluid refers to that there are both gaseous fluid and liquid fluid in the pressure cabin, and each of them maintains its original physical characteristic. Therefore, the gas-liquid fluid cannot be understood as mixed fluid. BACKGROUND

[0002] The gaseous fluid has surprising characteristics: no natural interface, the highest flowability, the highest compressibility, and the highest expansibility in nature.

[0003] The liquid fluid also has surprising characteristics: extremely soft and incompressible, and the only substance with only one natural interface in nature. Moreover, the natural interface is naturally horizontal.

[0004] In the natural state, the flow rule of gaseous fluid is to flow to the direction of low pressure, and the flow rule of liquid fluid is to yield to the earth's gravity. In the prior art, the fluid circulation is usually discharged to the normal environment and then reused. If it is a pressure fluid, it is basically simply discharged, which is a huge waste. Even the supercharging device of a car can only recycle a small part of the pressure gas for recycling.

[0005] It is hoped that a suitable fluid circulation system can be developed by utilizing the characteristics of these substances to serve mankind. SUMMARY

[0006] The present application provides a fluid circulation system to solve the problem that in the prior art, the fluid circulation is usually discharged to the normal environment and then reused. If it is a pressure fluid, it is basically simply discharged, which is a huge waste. Even the supercharging device of a car can only recycle a small part of the pressure gas for recycling.

[0007] In one aspect, the present application provides a fluid circulation system, which comprises a pressure cabin, an external valve, a controllable pump pressure device or a controllable propulsion device, an internal through-flow pipe, an external valve, a return flow conduit, etc. The controllable pump pressure device or the controllable propulsion device in the pressure cabin is connected with the internal through-flow pipe, the internal through-flow pipe is connected with the return flow conduit (the internal through-flow pipe can also be integrated with the return flow conduit), and the return flow conduit is connected with the pressure cabin. The outlet of the pressure cabin is connected with the external valve, and the external valve is connected with the return flow conduit. The external valve is an independent check valve or an independent on-off valve, or both an independent check valve and an independent on-off valve, or a combination including the functions of check valve and on-off valve. The controllable propulsion device includes an electromagnetic propulsion device, etc.

[0008] The working medium of the fluid circulation system can be gaseous fluid or gas-liquid fluid.

[0009] According to the fluid circulation system provided by the application, if the fluid in the pressure cabin is gas-liquid fluid, the height of the liquid fluid should completely immerse the fluid outlet arranged on the pressure cabin, and the gaseous fluid cannot enter the reflux conduit from the fluid outlet.

[0010] According to the fluid circulation system provided by the application, the pressure cabin can be provided with a plurality of fluid outlets connected with the same number of reflux conduits respectively.

[0011] According to the fluid circulation system provided by the application, the reflux conduit can be connected with one or more loads and other devices.

[0012] In another aspect, the application further provides a fluid circulation system, which comprises a pressure cabin, an external valve, gaseous fluid or gas-liquid fluid, controllable pump pressure device or controllable propulsion device, built-in flow conduit and reflux conduit; the fluid can only flow through the fluid outlet, the reflux conduit, and then enter the pressure cabin through the built-in flow conduit and / or controllable pump pressure device or controllable propulsion device, and backflow of the fluid is not allowed.

[0013] According to the fluid circulation system provided by the application, the flow area of the controllable pump pressure device or controllable propulsion device can be less than or equal to, or greater than the flow area of the built-in flow conduit. The flow area of the controllable pump pressure device or controllable propulsion device is usually the flow area of the outlet thereof.

[0014] The control form of the controllable pump pressure device or controllable propulsion device can be manual control or electric control, or other non-manual control.

[0015] The equivalent pressure cabin can be spherical or cylindrical, or other suitable shapes.

[0016] In order to improve the efficiency, more fluid can be stored in the fluid cabin 1-7, and the fluid flowing out of the fluid outlet enters the fluid cabin through the reflux conduit and then flows into the built-in flow conduit, so as to increase the gravitational potential energy of the fluid flowing back to the pressure cabin, and the fluid is more easily to enter the pressure cabin. The fluid cabin connected with the built-in flow conduit is actually an expansion of the reflux conduit.

[0017] Because of the adoption of the equivalent pressure cabin as the energy storage holding device of the fluid circulation system, the equivalent effect of the pressure cabin is always and ubiquitous, and the pressure fluid will even seem to "actively" break through the "defense" of the fluid, enter the reflux conduit, and actually "position exchange" occurs. The so-called "position exchange" is that the gaseous pressure fluid, which is the basis of energy holding, should only be permanently in the upper position of the equivalent pressure cabin, and the liquid fluid is squeezed by the structural force of the pressure cabin to flow to the outlet and return to the pressure cabin through the reflux conduit. Once "position exchange" occurs, the gaseous pressure fluid will partially or even completely enter the flow guide pipe, and the liquid fluid will accumulate in the pressure cabin or a small amount of retention in the flow guide pipe, and cannot circulate. "Position exchange" often occurs at the built-in valve port.

[0018] However, while the fluid flows out of the built-in valve port, the flow column will inevitably be resisted by the pressure of the gaseous pressure fluid in the pressure cabin, so that the fluid in the built-in flow guide pipe and the reflux conduit cannot smoothly return to the pressure cabin, and even while the fluid flows out of the built-in valve port, it pushes and forces the liquid fluid to give up part of the channel, and at the same time, it drills into the built-in valve port and flows up to the reflux conduit along the built-in flow guide pipe. The possible result is that a considerable part or even all of the gaseous pressure fluid in the pressure cabin escapes from the pressure cabin, resulting in pressure loss of the pressure cabin, while the liquid fluid can only accumulate in the pressure cabin and is difficult to flow.

[0019] Raising the vertical height of the reflux conduit can certainly prevent the gaseous pressure fluid in the pressure cabin from drilling into the built-in valve port and flowing up to the reflux conduit along the built-in flow guide pipe by using the corresponding gravitational potential energy formed by the height of the fluid. However, the volume of the circulation system may be too large, affecting the practicability.

[0020] Controlling with a controllable built-in valve is certainly a good method. However, the disadvantage of using a controllable built-in valve is that the appropriate flow area ratio of the controllable built-in valve and the outlet of the pressure cabin must be selected. It is difficult to determine the ratio relationship of the flow area of the two. If the flow area of the two is relatively close, "position exchange" may still occur. If it is relatively uneven, it may affect the circulation efficiency. Therefore, selecting the appropriate flow area ratio of the controllable built-in valve and the outlet of the pressure cabin will have to be obtained through a large number of experiments.

[0021] If a controllable pump pressure device or a controllable propulsion device is used instead of a built-in valve, it is possible to "eliminate" this situation.

[0022] The controllable pump pressure device or controllable propulsion device is an external energy device, which works by continuously extruding or pumping the liquid fluid in the built-in flow pipe into the pressure chamber. The liquid fluid entering the pressure chamber inevitably occupies the limited space of the pressure chamber, forcing the gaseous pressure fluid in the pressure chamber to extrude the liquid fluid below it out of the pressure chamber outlet. Once the liquid fluid flows out of the pressure chamber outlet, it can only flow forward along the return flow conduit, and cannot flow backward, because the one-way valve outside the chamber will not allow the liquid fluid flowing out of the pressure chamber outlet to flow back into the pressure chamber, but only flows back into the pressure chamber through the built-in flow pipe along the return flow conduit.

[0023] The controllable pump pressure device or controllable propulsion device can be used independently or in combination with the built-in valve. In fact, the controllable pump pressure device or controllable propulsion device connected with the built-in flow pipe itself has a locking function to prevent gaseous pressure fluid from entering the built-in flow pipe and return pipe.

[0024] In the fluid circulation system, it is not recommended to use or completely rely on the controllable pump pressure device or controllable propulsion device to push the fluid circulation including the required energy of the load. In other words, the controllable pump pressure device or controllable propulsion device is only an auxiliary device in the entire fluid circulation system to prevent gaseous pressure fluid from flowing backward into the built-in flow pipe, and only aims to help the liquid fluid in the built-in flow pipe overcome the "equivalent" effect of the environment in the pressure chamber, so that the liquid fluid in the built-in flow pipe can smoothly flow into the pressure chamber.

[0025] Even if the controllable pump pressure device or controllable propulsion device itself has enough power to push the complete fluid circulation, "God's return to God, Caesar's return to Caesar", the source of the fluid circulation including the required energy of the load still relies on the gaseous pressure fluid in the pressure chamber.

[0026] The controllable pump pressure device or controllable propulsion device is installed in the pressure chamber because the closer it is to the junction of two different environments, the less energy it consumes. Of course, if necessary, the controllable pump pressure device or controllable propulsion device can be installed outside the pressure chamber. However, if the controllable pump pressure device or controllable propulsion device is installed outside the pressure chamber, the efficiency will inevitably decrease and the energy consumption will increase.

[0027] In order to improve efficiency, more fluid can be stored in the fluid chamber 1-7, and the fluid flowing out of the fluid outlet first enters the fluid chamber and then flows into the built-in flow pipe through the return flow conduit, so as to increase the gravitational potential energy of the fluid flowing back to the pressure chamber, which will make it easier for the fluid to enter the pressure chamber. The fluid chamber connected with the built-in flow pipe is actually an expansion of the return flow conduit.

[0028] The fluid tank 1-7 is a large container, usually in the shape of a sphere or a cylinder, which can withstand a certain pressure. If a one-way valve is installed at the connection between the fluid tank and the return conduit 4 and / or the built-in flow conduit 4-1, it will become a large volume pressure stabilizing valve or tank. The liquid fluid in the fluid tank 1-7 can be full or not full. If the fluid tank 1-7 is not full of liquid fluid, the gaseous fluid remaining in the space not filled will be naturally pressurized (a small amount of gaseous fluid with a pressure higher than atmospheric pressure can also be injected), making it a pressure-stabilizing, pressurized tank. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 is a structural diagram of a fluid circulation system provided by the present application with the built-in flow conduit installed from top to bottom; Figure 1-1 is a structural diagram of a fluid circulation system with the built-in flow conduit installed from top to bottom and with a fluid tank; Figure 2 is a structural diagram of a fluid circulation system with the built-in flow conduit installed from bottom to top; Figure 2-1 is a structural diagram of a fluid circulation system with the built-in flow conduit installed from top to bottom and with a fluid tank; Figure 3 is a structural diagram of a fluid circulation system with the built-in flow conduit installed horizontally; Figure 3-1 is a structural diagram of a fluid circulation system with the built-in flow conduit installed horizontally and with a fluid tank; Reference signs: Pressure tank 1, gaseous pressure fluid 1-1, liquid fluid 1-11, pressure input device 1-2, safety device (pressure relief) 1-3, liquid fluid supplement port 1-4, fluid outlet 1-5, tank valve 1-6, fluid tank 1-7, controllable pump pressure device or controllable propulsion device 2, pressure stabilizing device or one-way flow stopping and reverse preventing device 3, return conduit 4, built-in flow conduit 4-1, load 5, flow valve 6. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] The fluid circulation system of the present application will be described below in conjunction with the accompanying drawings. For the convenience of understanding, the gas-liquid fluid self-circulation system is taken as an example.

[0033] Figure 1 is one of the structural diagrams provided by the present application.

[0034] As shown in Figure 1 , P is the pressure value of the pressure cabin 1, P1 is the pressure measurement point of the fluid outlet 1-5 of the pressure cabin 1, P2 is the pressure measurement point of the outlet of the controllable pump pressure device or controllable propulsion device 2, and P3 is the pressure measurement point of the connection between the controllable pump pressure device or controllable propulsion device 2 and the backflow conduit 4. The pressure measurement points are not the actual structure of the fluid circulation system, but only the identification for easy understanding.

[0035] The pressure cabin 1 is one of the most important core components in the fluid circulation system.

[0036] The pressure cabin 1 is a hollow object with a large space inside. The pressure cabin needs to withstand high pressure, so it is usually made of solid materials. The shape of the pressure cabin 1 can be spherical or cylindrical, or other cuboids with length, width and height. After all channels including controllable pump pressure devices or controllable propulsion devices, cabin external valves and the like are closed, the internal pressure of the pressure cabin at any point is equivalent, so it is called an equivalent pressure cabin. The built-in flow conduit 4-1 is installed in the pressure cabin 1.

[0037] Because the pressures at all points in the internal environment of the pressure cabin are equivalent, it is extremely difficult for the fluid to enter the pressure cabin due to the internal pressure of the pressure cabin. The built-in flow conduit 4-1 is installed in the pressure cabin 1, and the pipe wall of the built-in flow conduit blocks the internal pressure of the pressure cabin for the fluid, which is equivalent to opening a special channel for the fluid to enter the pressure cabin and not allowing the fluid to flow back. The fluid outlet 1-5 is also processed below the pressure cabin 1.

[0038] The cabin external valves 1-6 are connected with the outlet 1-5 of the pressure cabin 1 and the backflow conduit 4 and can make the pressure cabin inside and outside conductive or closed. The so-called cabin external valve refers to the general term of the pressure cabin outside including check valves, overflow valves, on-off valves and the like.

[0039] The return conduit 4 is a relatively long and slender pipe that serves as a passage for fluid outside the pressure chamber. One end of the return conduit 4 connects to the internal flow pipe 4-1, and the other end connects to the external valve 1-6. It can also connect to the flow valve 6, the pressure stabilizing device or the one-way check / reverse device (or both simultaneously), the load 5, etc. Furthermore, multiple loads 5 can be connected to the return conduit 4. It should be noted that the return conduit 4 can also extend directly into the pressure chamber, becoming the internal flow pipe 4-1. The difference between the internal flow pipe 4-1 and the return conduit 4 is that the internal flow pipe 4-1 is located inside the pressure chamber, while the return conduit 4 is located outside. Separate labeling and explanation make it easier to understand the working principle of the entire self-circulation system.

[0040] Pressure chamber 1 is also equipped with a pressure input device 1-2, a safety device (pressure relief) 1-3, and a liquid fluid replenishment port 1-4. Pressure chamber 1 can contain different fluids. If it is a gaseous circulation system, only gaseous fluid 1-1 is needed; if it is a gas-liquid circulation system, both gaseous fluid 1-1 and liquid fluid 1-11 are required. Gaseous fluid 1-1 is a pressurized fluid with high flowability, high compressibility, and high expandability, while liquid fluid 1-11 is a fluid that can flow rapidly under sufficient pressure.

[0041] If a gas-liquid fluid is used, the height (or depth) of the liquid fluid 1-11 in pressure chamber 1 must completely submerge the fluid outlet 1-5 (e.g., Figure 1 As shown, liquid fluid 1-11 is marked with two arrows. The upper arrow points to the surface of the liquid fluid, which can also be understood as the interface or contact surface between the liquid fluid and gaseous fluid 1-1. The lower arrow points to the liquid itself of liquid fluid 1-11, ensuring that gaseous fluid 1-1 cannot enter the return conduit 4 from fluid outlet 1-5. It should be noted that outlet 1-5 is the outlet of pressure chamber 1. The gaseous fluid 1-1 in pressure chamber 1 is usually input by pressure input device 1-2, such as an air compressor or air tank.

[0042] Taking the gas-liquid fluid circulation system as an example, when the pressure of the gaseous fluid 1-1 in the pressure chamber 1 reaches the set pressure value, the gaseous fluid 1-1 tries to occupy more of the limited space in the pressure chamber 1, which will force the liquid fluid 1-11 to flow from the fluid outlet 1-5 of the pressure chamber 1 into the return pipe 4. The return pipe 4 then inputs the liquid fluid 1-11 into the built-in flow pipe 4-1, and the controllable pump pressure device or the controllable propulsion device 2 is turned on, so that the liquid fluid 1-11 can flow back into the pressure chamber 1.

[0043] The pressure cabin 1 is usually only required to be processed with one fluid outlet 1-5 connected with the return conduit 4 at its lower position. But if required, the pressure cabin 1 can also be processed with several fluid outlets 1-5 connected with the return conduit 4; when the pressure of the gaseous fluid 1-1 in the pressure cabin 1 reaches the set pressure value, the liquid fluid 1-11 is forced to flow from each fluid outlet 1-5 into the corresponding return conduit 4, and the return conduit 4 delivers the liquid fluid 1-11 to the built-in through-flow pipe 4-1. In addition to being connected with multiple return conduits 4 respectively, the several fluid outlets 1-5 of the pressure cabin 1 can also be connected with one return conduit 4 with a larger inner diameter; when the pressure of the gaseous fluid 1-1 in the pressure cabin 1 reaches the set value, the liquid fluid 1-11 is forced to flow from the fluid outlets 1-5 into the return conduit 4 with a larger inner diameter, and then is delivered to the built-in through-flow pipe 4-1 in the pressure cabin through the return conduit 4 with a larger inner diameter. The controllable pump pressure device or controllable propulsion device 2 can make the liquid fluid 1-11 reflow into the pressure cabin.

[0044] The pressure cabin 1 is usually also equipped with pressure input device 1-2, safety device (pressure relief) 1-3, liquid fluid supplement port 1-4, flow valve 6 and other accessories.

[0045] The controllable pump pressure device or controllable propulsion device 2 is one of the most important core components in the fluid circulation system.

[0046] The controllable pump pressure device or controllable propulsion device 2 is actually an external energy or power device that can suck or squeeze the fluid in the built-in through-flow pipe 4-1 into the pressure cabin. Since it is installed in the pressure cabin, it is collectively referred to as a controllable pump pressure device or controllable propulsion device. When the controllable pump pressure device or controllable propulsion device is not working, it can usually block the fluid in the built-in through-flow pipe 4-1 from flowing into the pressure cabin, and at the same time block the gaseous pressure fluid from entering the built-in through-flow pipe 4-1. The controllable pump pressure device or controllable propulsion device 2 must be turned on and off according to the control command.

[0047] The pressure at each point in the pressure cabin is equal, and it is usually difficult for the fluid to return to the pressure cabin by itself. By placing the built-in through-flow pipe 4-1 in the pressure cabin, the fluid has actually entered the pressure cabin, and it is obviously easier to flow out of the controllable pump pressure device or controllable propulsion device into the pressure cabin.

[0048] The installation of the controllable pump pressure device or controllable propulsion device 2 can be in three ways: the controllable pump pressure device or controllable propulsion device can be installed from top to bottom, with the outlet of the controllable pump pressure device or controllable propulsion device usually pointing downward, or in other directions; the controllable pump pressure device or controllable propulsion device can also be installed from bottom to top, with the outlet of the controllable pump pressure device or controllable propulsion device usually pointing upward, or in other directions; the controllable pump pressure device or controllable propulsion device can also be installed horizontally, with the outlet of the controllable pump pressure device or controllable propulsion device usually pointing toward the side wall of the pressure chamber, or in other directions.

[0049] When the controllable pump pressure device or controllable propulsion device is installed from top to bottom with gas-liquid fluid circulation, the outlet of the controllable pump pressure device or controllable propulsion device 2 should point downward and be as close as possible to the surface of the liquid fluid. When the controllable pump pressure device or controllable propulsion device is installed from bottom to top, the outlet of the controllable pump pressure device or controllable propulsion device 2 should point upward and be as close as possible to the upper surface of the pressure chamber. When the controllable pump pressure device or controllable propulsion device is installed horizontally, the outlet of the controllable pump pressure device or controllable propulsion device 2 should be arranged horizontally and be as close as possible to the side wall surface of the pressure chamber.

[0050] The outlet of the controllable pump pressure device or controllable propulsion device 2 should be as close as possible to the inner surface of the pressure chamber or the surface of the liquid fluid, because the closer the outlet of the controllable pump pressure device or controllable propulsion device is to the inner surface of the pressure chamber or the surface of the liquid fluid, the less interference the gaseous fluid in the pressure chamber will have on the fluid flowing out of the outlet of the controllable pump pressure device or controllable propulsion device 2, and the fluid column flowing out of the outlet of the controllable pump pressure device or controllable propulsion device 2 itself also has a certain impact, which helps to push away the surrounding gaseous fluid and prevent the gaseous fluid from flowing back into the built-in flow pipe 4-1.

[0051] Specifically, regardless of whether the controllable pump pressure device or controllable propulsion device 2 is installed upward or downward or horizontally, the maximum distance between the outlet of the controllable pump pressure device or controllable propulsion device and the inner surface of the pressure chamber or the surface of the liquid fluid is usually not more than 5 times the diameter of the outlet of the controllable pump pressure device or controllable propulsion device. For example, when the diameter of the outlet of the controllable pump pressure device or controllable propulsion device is 10 millimeters (mm), the maximum distance between the outlet of the controllable pump pressure device or controllable propulsion device and the inner surface of the pressure chamber or the surface of the liquid fluid is not more than 50 millimeters (10 mm x 5); for another example, when the diameter of the outlet of the controllable pump pressure device or controllable propulsion device is 5 millimeters, the maximum distance between the outlet of the controllable pump pressure device or controllable propulsion device 2 and the inner surface of the pressure chamber or the surface of the liquid fluid is not more than 25 millimeters (5 mm x 5).

[0052] The pressure stabilizing device 3 is a device that can stabilize the pressure of the circulation system and even can also increase the pressure of the circulation system, and the pressure stabilizing device is connected with the backflow conduit 4 and can be connected with the backflow conduit outside the pressure chamber 1 or connected with the built-in flow pipe 4-1 inside the pressure chamber.

[0053] The pressure stabilizing device 3 has several different control forms such as mechanical control, motor control or fluid control.

[0054] The pressure stabilizing device 3 with fluid control can provide pressure stabilization by itself. The working cavity is a fluid passage, and at least one check valve is installed to allow fluid to flow out of the pressure chamber outlet 1-5 and to the pressure chamber, and not to allow backflow. If multiple check valves are installed, the pressure stabilization effect will be better.

[0055] Working principle The gas-liquid fluid circulation principle is more complex than the gaseous fluid circulation principle, so the gas-liquid fluid circulation principle is used as the basis for elaboration.

[0056] A certain amount of gaseous fluid 1-1 and liquid fluid 1-11 are respectively input into the pressure chamber 1. Due to the effect of density and gravity, the liquid fluid 1-11 is always below the gaseous fluid 1-1. The height of the liquid fluid must always be submerged in the fluid outlet 1-5, ensuring that the gaseous fluid 1-1 in the pressure chamber 1 cannot escape from the pressure chamber 1 through the fluid outlet 1-5 in any state, and ensuring that the gaseous fluid cannot enter the return conduit 4 at all times, and always maintaining a constant state and quantity. The so-called constant state is that the gaseous fluid in the pressure chamber 1 always has a set constant pressure; and the so-called constant quantity is that the spatial volume of the gaseous fluid in the pressure chamber is always kept unchanged.

[0057] The upper surface of the liquid fluid 1-11 is a natural self-leveling surface, that is, it naturally has a horizontal interface. The gaseous fluid 1-1 in the pressure chamber 1 will uniformly cover the upper surface of the liquid fluid 1-11, so that the lower surface of the gaseous fluid 1-1 will be passively formed into a horizontal interface. The upper surface of the liquid fluid 1-11 thus bears the average pressure in the pressure chamber 1.

[0058] The liquid fluid 1-11 can usually easily flow from the fluid outlet 1-5 of the pressure chamber 1 to the return conduit 4. However, because the gaseous fluid 1-1 in the pressure chamber 1 has sufficient pressure, it is quite difficult for the liquid fluid 1-11 to re-enter the pressure chamber 1.

[0059] From Pascal's theorem, the fluid pressure in a closed container will uniformly act on each point, Therefore, the gaseous fluid 1-1 in the pressure chamber 1 that has reached the set pressure value will also uniformly act on each point. However, the uniform action on each point here mainly refers to the flow channel openings such as the fluid outlet 1-5 of the pressure chamber 1, the outlet of the controllable pump pressure device or controllable propulsion device 2 in the pressure chamber 1, etc.

[0060] At this time, the pressure value P of the gaseous fluid 1-1 applied to the surface of the liquid fluid 1-11 is completely equal to the pressure value P of each point or any point in the pressure chamber 1 (the pressure measurement points P1, P2 are equivalent). As for the measurement point P3 at the connection between the controllable pump pressure device or controllable propulsion device 2 and the return flow conduit, it can be equal to the pressure value P in the pressure chamber 1, the measurement points P1, P2, or it can not be equal. Here, "equal" or "not equal" is the key to the "open" or "closed" state of the out-of-chamber valve 1-6.

[0061] If the out-of-chamber valve 1-6 is in the "closed" state, the pressure chamber 1 and the controllable pump pressure device or controllable propulsion device 2 and the return flow conduit are not connected, and the pressure value of the measurement point P3 is less than the pressure value of the measurement points P1, P2 in the pressure chamber 1.

[0062] If the out-of-chamber valve 1-6 is in the "open" state at this time, there are two possibilities, 1, the controllable pump pressure device or controllable propulsion device 2 outlet is still not opened, then the pressure value of the measurement point P3 should be equal to the pressure value of the measurement points P1, P2 in the pressure chamber 1; 2, the controllable pump pressure device or controllable propulsion device 2 outlet is opened, and the liquid fluid 1-11 flows out from the controllable pump pressure device or controllable propulsion device 2 outlet, then the pressure value of the measurement point P3 should be less than the pressure value of the measurement points P1, P2 in the pressure chamber 1, and as the flow rate of the liquid fluid 1-11 continues to increase, according to Bernoulli's principle, the difference between the pressure value of the measurement point P3 and the pressure value of the measurement points P1, P2 is greater.

[0063] As common sense knows, if the pressure of the measurement point P3 is equal to or less than the pressure of the measurement points P1, P2, the liquid fluid 1-11 may not be able to break through the barrier of the gaseous fluid 1-1 and return to the pressure chamber 1, and if the pressure of the measurement point P3 is greater than the pressure of the measurement points P1, P2, the liquid fluid 1-11 should be able to break through the barrier of the gaseous fluid 1-1 and return to the pressure chamber 1.

[0064] In fact, as soon as the out-of-chamber valve 1-6 is opened, a channel is immediately formed between the pressure chamber 1 and the controllable pump pressure device or controllable propulsion device 2 and the return flow conduit, and the gaseous fluid 1-1 will immediately flow towards the controllable built-in valve or controllable propulsion device 2, the built-in flow conduit 4-1, and the return flow conduit 4, trying to break through the "defense" of the controllable pump pressure device or controllable propulsion device 2 and flow back into the return flow conduit 4, and the liquid fluid 1-11 originally filled in the return flow conduit 4 will also immediately flow down at the same time. Of course, this is only the "tendency, trend" of both at the moment when the out-of-chamber valve 1-6 is opened.

[0065] If the gaseous fluid 1-1 and the liquid fluid 1-11 are personified, the gaseous fluid 1-1 would like to exchange its position with the liquid fluid 1-11 to enter the controllable pump pressure device or controllable propulsion device 2, the built-in through-flow pipe 4-1, and the return flow conduit 4, while the liquid fluid 1-11 in the built-in through-flow pipe 4-1 would like to break through the barrier of the gaseous fluid 1-1 to enter the pressure chamber 1.

[0066] Once the pressure of the gaseous fluid 1-1 in the pressure chamber 1 is raised and has sufficient pressure, the liquid fluid 1-11 will have to flow from the fluid outlet 1-5 of the pressure chamber 1 to the controllable built-in valve 2 via the return flow conduit 4.

[0067] In addition, the liquid fluid 1-11 also has another inherent advantage: the density of the soft liquid fluid 1-11 that changes with the situation is much greater than that of the gaseous fluid 1-1, and the density difference between the two is hundreds of times. If the "wall-attached" effect and the interface "tension" effect of the liquid fluid 1-11 can be excluded, the gaseous fluid 1-1 cannot prevent the falling of the liquid fluid 1-11 affected by the gravitational acceleration. In other words, once the gaseous fluid 1-1 with very small density has to give way to the liquid fluid 1-11 with very large density and falls under the effect of the gravitational acceleration, the gaseous fluid 1-1 in the pressure chamber 1 cannot resist the downward flow of the liquid fluid 1-11 in the one-way through-flow and reverse-flow prevention device 2.

[0068] The flow continuity of the liquid fluid 1-11 is sufficient to prevent the position exchange between the reverse-flowing gaseous fluid 1-1 and the forward-flowing liquid fluid 1-11.

[0069] As long as the position exchange between the reverse-flowing gaseous fluid 1-1 and the forward-flowing liquid fluid 1-11 is prevented, the circulation of the liquid fluid 1-11 from the pressure chamber 1 to the controllable pump pressure device or controllable propulsion device 2 via the return flow conduit 4 and back to the pressure chamber 1 is possible.

[0070] The gaseous fluid 1-1 in the pressure chamber 1 will be compressed due to the continuous inflow of the liquid fluid 1-11 through the one-way through-flow and reverse-flow prevention device 2, so the pressure value P in the pressure chamber 1 increases, and the liquid fluid 1-11 is forced to continue to flow from the fluid outlet 1-5 to the return flow conduit 4, so that the volume of the gaseous fluid 1-1 in the pressure chamber 1 remains constant, the pressure remains constant, and the total pressure is balanced. The liquid fluid 1-11 flowing from the fluid outlet 1-5 to the return flow conduit 4 will re-enter the controllable pump pressure device or controllable propulsion device 2 under the pressure of the gaseous fluid 1-1 and then flow downward into the pressure chamber 1. Thus, the circulation is completed.

[0071] Example 1 Take a communication pipe with three branches, the horizontal main pipe can be larger than each branch pipe in diameter, or the same as each branch pipe. The height and diameter of each branch pipe are the same, and the distance between the central branch B and branch A and branch C is the same. Each branch pipe is connected to the atmosphere.

[0072] Inject water from any branch pipe, and you can see that the water level in each branch pipe is the same, indicating that the pressure in each branch pipe is the same, in line with Pascal's theorem.

[0073] Example 2 Take the communication pipe of the preceding clause, completely seal the upper end of branch pipe C. Inject water from branch pipe B, and you can see that the water level in branch pipe A and branch pipe B is the same, while the water level in branch pipe C is slightly lower, indicating that there is unexpelled atmosphere in branch pipe C, and the pressure of the unexpelled atmosphere is greater than the pressure of the water in branch pipes A and B, in line with Pascal's theorem.

[0074] Example 3 Take the communication pipe of the preceding clause, branch pipe A is bent and extended above branch pipe C, but not connected to branch pipe C; branch pipe B is not connected to branch pipe A or branch pipe C, but is connected to another pressure gas pipe (not leakable). The upper end of branch pipe C is open, and the lower end is connected to the horizontal main pipe with a switch, but is in a closed state, so the upper part of branch pipe C is also connected to the atmosphere. At this point, it is no longer a communication pipe.

[0075] Continuously input a certain pressure gas into branch pipe B, and you can see that the water in branch pipe A quickly reaches above branch pipe C and flows into branch pipe C until it overflows, indicating that the pressure in branch pipe A is greater than the pressure in branch pipe C, in line with Pascal's theorem and Bernoulli's theorem - the water in branch pipe A obtains a longer flow path, greater flow rate and higher flow speed, so the pressure is less than the pressure in the horizontal main pipe and branch pipe B.

[0076] Example 4 Take the communication pipe of the preceding clause, branch pipe A is bent and extended to connect with branch pipe C, and the switch at the lower end of branch pipe C connected to the horizontal main pipe is still in a closed state, so there is unexpelled atmosphere in the pipe diameter where branch pipe A connects with branch pipe C. Branch pipe B is still connected to another pressure gas pipe.

[0077] Continuously input a certain pressure gas into branch pipe B, and you can see that the water in branch pipe A reaches above branch pipe C and flows into branch pipe C, and the remaining gaseous state in branch pipe C floats above it. Stop inputting pressure gas into branch pipe B at this point, and maintain the current state. If structural factors are excluded, the pressure in branch pipe B is the highest at this point, the pressure in branch pipe A is second, and the pressure in branch pipe C is the lowest. This is in line with Pascal's theorem and Bernoulli's theorem - at this point, the pressure in each branch pipe is actually equal.

[0078] Open the switch at the lower end of branch pipe C and the connection with the horizontal main pipe, it can be seen that the residual gas in branch pipe C moves rapidly to the direction of branch pipe A and stays at the high point of the curved extension of branch pipe A. A small amount of water in branch pipe A and the gas in branch pipe C have exchanged positions, and the water in the horizontal main pipe also rapidly flows into branch pipe C and branch pipe B, and the gas and water in branch pipe B each occupy part of the space. It is shown that the residual gas in branch pipe B and branch pipe C and part of the water in the horizontal main pipe have also exchanged positions, and the pressure is ultimately balanced. This still conforms to both Pascal's theorem and Bernoulli's theorem.

[0079] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid circulation system, mainly composed of a pressure chamber, a controllable pump pressure device or a controllable propulsion device, an internal flow pipe, an external valve, a return flow pipe, etc., characterized in that: The controllable pump pressure device or controllable propulsion device in the pressure chamber is connected to the built-in flow passage pipe, which is connected to the return flow pipe. The pressure chamber outlet is connected to the external valve, which is connected to the return flow pipe. The external valve is an independent check valve or an independent on / off valve, or it can be a combination of an independent check valve and an independent on / off valve, or it can be a combination of check valve and on / off valve functions.

2. The fluid circulation system according to claim 1, characterized in that: Fluid can only enter the pressure chamber through the built-in flow passage and / or the controllable pump pressure device or the controllable propulsion device.

3. The fluid circulation system according to claim 1, characterized in that: The flow cross-sectional area of ​​the controllable pump pressure device or controllable propulsion device is less than or equal to, or greater than, the flow cross-sectional area of ​​the built-in flow pipe.

4. A fluid circulation system according to claim 1, characterized in that: The controllable pump pressure device or controllable propulsion device can be used independently or in combination with the built-in valve.

5. A fluid circulation system according to claim 1, characterized in that: The reflux conduit can be connected to one or more loads, and can also be connected to other devices.

6. A fluid circulation system with a controllable pump pressure device or a controllable propulsion device, mainly composed of a pressure chamber, a controllable pump pressure device or a controllable propulsion device, an internal flow pipe, an external valve, a return flow pipe, etc., characterized in that: The controllable pump pressure device or controllable propulsion device in the pressure chamber can be installed from top to bottom, with the outlet of the controllable pump pressure device or controllable propulsion device facing downward or in another direction; the controllable pump pressure device or controllable propulsion device can also be installed from bottom to top, with the outlet of the controllable pump pressure device or controllable propulsion device facing upward or in another direction; the controllable pump pressure device or controllable propulsion device can also be installed laterally, with the outlet of the controllable pump pressure device or controllable propulsion device facing the side wall of the pressure chamber or in another direction.

7. A fluid circulation system according to claim 6, characterized in that: The controllable pump pressure device or controllable propulsion device is controlled manually, electrically, or in other non-manual ways.

8. A fluid circulation system according to claim 6, characterized in that: When necessary, a controllable pump pressure device or a controllable propulsion device can be installed outside the pressure chamber.

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