Liquid pressure feeding device, energy conversion device and liquid pressure feeding method

Abstract

The invention discloses a liquid pressure feeding device, an energy conversion device and a liquid pressure feeding method. The liquid pressure feeding device comprises a liquid inlet pipe, a liquid outlet pipe, a first container, a second container, a balance rope and a balance block, the second container is arranged in the first container, a supporting frame is arranged at the top of the first container, a fixed pulley is installed on the supporting frame, and the balance rope bypasses the fixed pulley and is connected with the second container and the balance block; the liquid inlet pipe is movably communicated with the second container; an opening is formed in the bottom of the second container; a cover plate is hinged to the inner bottom surface of the second container; a limiting column is arranged on the inner bottom surface of the first container; an annular waterstop is arranged in the first container, surrounds the outer side wall of the second container, is in movable contact with the outer side wall of the second container, and is in sealed connection with the first container; the lower end of the liquid outlet pipe is communicated with the space below the annular waterstop. Under the condition that an external power source is not arranged, liquid to be pressurized and fed can form pressurized water flow, the pressurized water flow can be connected with a water turbine to provide a power source for the water turbine, the pressurized water flow can be used for multiple purposes such as power generation and industrial and agricultural production, or the pressurized water flow can be pressurized and fed to target positions with relatively higher positions in batches, and energy consumption can be reduced.

Description

Technical Field

[0001] This invention relates to a liquid pressure conveying device, an energy conversion device, and a liquid pressure conveying method, belonging to the field of liquid conveying equipment. Background Technology

[0002] Water and aqueous solutions are widely used in industry and agriculture. In actual industrial and agricultural production, it is often necessary to move water and aqueous solutions from lower to higher elevations. For example, the impact of water can drive the turbine blades to generate electricity; in farmland irrigation, low-level water in irrigation ditches is often transported to higher-level farmland using pumps and other pumping equipment. This not only consumes energy, but also increases the risk of environmental pollution because many farmland areas lack power lines, often requiring internal combustion engines as the power source for pumping equipment since this is not always possible.

[0003] Chinese invention patent application CN104100487A discloses a piston-type water pumping device, including a cylinder and a motor. The cylinder is supported on the water surface by a float. A piston plate capable of reciprocating up and down is installed inside the cylinder. The piston plate has a water outlet, and a valve is installed on the water outlet. The piston plate is connected to the motor via a crankshaft connecting rod mechanism. The top of the cylinder is open, and a water receiving tray is connected around the opening. The water receiving tray is connected to an outlet pipe, and the lower end is connected to an inlet pipe, which is equipped with a valve. This patented water pumping device relies on a motor as a power source to transport water to the target location. Summary of the Invention

[0004] To address the shortcomings of existing technologies, one objective of this invention is to provide a liquid pressurization device to save energy consumption in liquid transportation; another objective is to provide an energy conversion device; and a third objective is to provide a liquid pressurization method.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A liquid conveying device includes an outlet pipe, a first container, a second container, and a balance rope. The second container is disposed inside the first container. A support frame is provided on the top of the first container. One end of the balance rope is connected to the top of the second container. A fixed pulley is installed on the support frame. The balance rope hangs down at both ends after passing over the fixed pulley. The other end of the balance rope is connected to a balance block. Alternatively, an elastic element is provided on the support frame. One end of the elastic element is connected to the support frame, and the other end of the elastic element is connected to the other end of the balance rope. An inlet pipe is movably connected to the second container. A valve is provided; the bottom of the second container has an opening, and a cover plate is hinged to the inner bottom surface of the second container to cover the opening; an upwardly extending limiting post is fixed to the inner bottom surface of the first container, and the projection of the top of the limiting post on the inner bottom surface of the first container is located within the projection of the opening on the inner bottom surface of the first container; an annular water stop is fixed inside the first container, the inner side of the annular water stop surrounds the outer wall of the second container and is movably in contact with the outer wall of the second container, and the outer side of the annular water stop is sealed to the first container; the lower end of the liquid outlet pipe communicates with the space below the annular water stop inside the first container.

[0006] Optionally, a liquid pressurization device includes an inlet pipe, an outlet pipe, a first container, a second container, a balance rope, and a balance block. The second container is disposed inside the first container. A support frame is provided on the top of the first container, and a fixed pulley is installed on the support frame. The balance rope passes over the fixed pulley and hangs down at both ends. One end of the balance rope is connected to the top of the second container, and the other end is connected to the balance block, so that the second container can move up and down under the action of the balance block. When the liquid to be pressurized is injected into the second container and reaches a certain amount, the second container can overcome the action of the balance block and move downward, thereby realizing the ability to rise and fall. The inlet pipe is movably connected to the second container, and a valve is provided on the inlet pipe to control the opening and closing of the inlet pipe, thereby controlling whether the liquid source is connected to the second container. The bottom of the second container has an opening, and a cover plate is hinged to the inner bottom surface of the second container to cover the opening, so that a certain amount of liquid to be pressurized can be stored in the second container. An upwardly extending limiting post is fixed to the inner bottom surface of the first container, and the top of the limiting post is at... The projection of the inner bottom surface of the first container is located within the projection of the opening on the inner bottom surface of the first container, so that the top positions of the cover plate and the limiting post match each other. When the second container containing the pressurized liquid moves to the position of the limiting post, the cover plate abuts against the limiting post, and the cover plate flips upward to a certain extent, thereby connecting the second container with the first container, and the liquid in the second container flows into the first container. An annular water stop is fixed inside the first container. The inner side of the annular water stop surrounds the outer wall of the second container and is movably in contact with the outer wall of the second container. The outer side of the annular water stop is sealed to the first container, so that the second container can move up and down relative to the annular water stop, and the second container and the annular water stop are sealed, laying the foundation for the second container to pressurize the liquid in the first container into the outlet pipe during the descent. The lower end of the outlet pipe is connected to the space below the annular water stop in the first container. During the descent of the second container, the liquid to be pressurized in the space below the annular water stop is pressed into the outlet pipe and discharged to the target position through the upper end of the outlet pipe.

[0007] Therefore, without setting up external power sources such as motors and pumps, the liquid to be pressurized can be sequentially pressurized to target locations such as relatively higher positions by relying on the potential energy of the liquid itself, which helps to save energy and reduce the risk of environmental pollution.

[0008] As an alternative, using elastic elements instead of balance blocks and fixed pulleys can achieve similar effects as described above.

[0009] Optionally, the upper end of the outlet tube is oriented vertically or horizontally.

[0010] Optionally, the upper end of the outlet pipe is oriented horizontally, and can be connected to the spiral casing of the turbine to drive the turbine to operate continuously for power generation, industrial and agricultural production, etc. Optionally, at least two sets of liquid pressure conveying devices and turbines can be installed.

[0011] Optionally, the turbine outlet is connected to a liquid source to enable the reuse of the turbine tailwater.

[0012] Furthermore, the inlet pipe is a flexible pipe, preferably a spiral elastic pipe or a corrugated pipe.

[0013] Furthermore, the inlet pipe has a flexible section located upstream of the second container, and the flexible section is one of a spiral elastic pipe or a corrugated pipe.

[0014] By using a flexible tube or an inlet tube with a flexible section, a movable connection is achieved between the inlet tube and the second container, allowing the second container to have the freedom to move up and down.

[0015] Furthermore, the upper end of the outlet pipe is located higher than the inlet end of the inlet pipe. Thus, the liquid to be pressurized can be discharged through the upper end of the outlet pipe to a target position that is higher than the liquid source. This liquid can be used for irrigation or to provide the power source required for impact turbines, thereby generating electricity or for industrial and agricultural production.

[0016] Furthermore, the lower end of the outlet pipe is positioned below the top of the limiting post. This helps to reduce the required liquid volume in the first container in the initial state.

[0017] Furthermore, the second container is provided with a groove extending vertically. The outlet end of the liquid inlet pipe passes through the groove and extends into the second container, with the liquid inlet pipe and the groove fitting together with a clearance. When the second container descends to the position where the limiting post abuts against the cover plate, the lower end of the groove is higher than the position of the annular water stop. Preferably, the lower end of the groove is 5-30cm higher than the position of the annular water stop, more preferably 10-15cm. This also allows for movable communication between the liquid inlet pipe and the second container, giving the second container the freedom to move up and down. A certain distance exists between the lower end of the groove and the bottom plate of the second container, allowing the second container to function properly as a liquid container. Additionally, the cooperation between the liquid inlet pipe and the groove guides and limits the movement of the second container, making its up-and-down movement smoother. The liquid inlet pipe can be made of rigid materials such as plastic or iron, or it can be made of flexible material.

[0018] Furthermore, the other end of the balancing rope is detachably connected to the balancing weight, thereby facilitating the replacement of balancing weights of different weights according to application requirements and simplifying inspection and maintenance. Optionally, the other end of the balancing rope is equipped with a lifting ring, and the top of the balancing weight is fixed with a hook, allowing for easy detachable connection between the balancing weight and the balancing rope through the engagement of the lifting ring and the hook.

[0019] Furthermore, the inner side of the annular waterstop is movably and sealingly connected to the outer wall of the second container; preferably, the material of the balance block is metal or concrete, and the metal is one or more of steel and copper alloys. Thus, using a material with a higher specific gravity as the balance block helps to save space and improve the compactness of the device structure.

[0020] Furthermore, the cover plate is provided with a sealing ring, which surrounds the opening when the cover plate covers the inner bottom surface of the second container; or, a sealing ring is provided on the inner bottom surface of the second container, surrounding the opening, and the cover plate abuts against the sealing ring when the cover plate covers the inner bottom surface of the second container. This helps to improve the sealing performance between the cover plate and the inner bottom surface of the second container, further improving the hydraulic pressing efficiency.

[0021] Alternatively, the sealing ring can be a common rubber sealing ring.

[0022] Furthermore, it also includes a limiting rod fixed to the support frame. The lower end of the limiting rod extends into the second container. When the lower end of the limiting rod contacts the inner bottom surface of the second container or the cover plate (which is in the closed state at this time), the height of the bottom surface of the second container is not higher than the height of the annular stop. This prevents the second container from rising to the position where it is separated from the annular stop, allowing the liquid pressure conveying device to continuously circulate and pressurize the liquid to the target position in batches. When the lower end of the limiting rod contacts the cover plate, it also helps to improve the tightness between the cover plate and the inner bottom surface of the second container. Furthermore, it also includes an inlet pipe, which communicates with the space below the annular stop in the first container. The inlet pipe is equipped with a first one-way valve that can only be opened towards the inside of the first container, and the outlet pipe is equipped with a second one-way valve that can only be opened towards the upper end of the outlet pipe. Therefore, after a batch of liquid is pressurized, at least some of the liquid remaining in the outlet pipe will not leak into the first container, but will remain in the outlet pipe. When the next batch of liquid is pressurized, the liquid remaining in the outlet pipe can be further pressurized to the target location, which helps to reduce the loss of potential energy and other energy, and increase the liquid pressurization volume of each batch. At the same time, through the setting of the inlet pipe and the first one-way valve, the air pressure of the outside and the space below the annular stop can be balanced when the second container rises, so that the second container can rise smoothly. In addition, the inlet pipe can also be used to inject the liquid to be pressurized into the space to create a specific state, such as the initial state.

[0023] Preferably, the second check valve is located at the lower end of the outlet pipe. This helps to further increase the liquid pressure delivery rate per batch and avoids the waste of potential energy of the liquid remaining in the outlet pipe.

[0024] Furthermore, the second container is cylindrical; the liquid pressurization device also includes multiple guiding mechanisms, which are evenly distributed along the outer periphery of the second container and located above the annular waterstop. Each guiding mechanism includes a support, one end of which is fixed to the inner wall of the first container, and the other end of which is equipped with a rolling mechanism. The rolling mechanism includes rollers or balls, and it abuts against the outer wall of the second container. The central axis of the rolling mechanism is parallel to the horizontal plane. Thus, the guiding mechanism guides the up-and-down movement of the second container, working in conjunction with the annular waterstop to make the up-and-down movement of the second container more stable.

[0025] Optionally, the opening is circular or rectangular. Preferably, the opening is circular and shares a central axis with the second container.

[0026] Furthermore, the outer wall of the second container is smooth so that the second container can move more smoothly up and down relative to the annular stop.

[0027] Optionally, the outer wall of the second container is coated with lubricating oil to allow for smoother up-and-down movement of the second container relative to the annular stop. Regular maintenance and lubrication can be performed to ensure the smooth operation of the device.

[0028] Optionally, the first container may be made of reinforced concrete or steel.

[0029] Optionally, the sidewalls of the second container are made of stainless steel or plastic steel.

[0030] Preferably, the annular water stop is located below the liquid inlet pipe.

[0031] Furthermore, the annular waterstop is made of P-type waterstop rubber, with one side of the P-type waterstop rubber having a circular cross-section that can movably contact the outer wall of the second container. This allows for a sealed yet movably connected connection between the annular waterstop and the outer wall of the second container.

[0032] Based on the same inventive concept, the present invention also provides: an energy conversion device, including a water turbine, wherein the water inlet of the water turbine is connected to the liquid outlet pipe of the liquid pressure conveying device as described above.

[0033] Optionally, the upper end of the outlet pipe is connected to the water inlet of the turbine casing.

[0034] Based on the same inventive concept, the present invention also provides: a liquid pressure conveying method, which utilizes the liquid pressure conveying device described above, comprising the following steps: S1. Initial state: The first container is filled with liquid to be pressurized. The liquid level in the first container is higher than the top of the limiting column but not higher than the annular stop. The height of the bottom of the second container is not higher than the height of the annular stop. Preferably, the liquid level in the second container is higher than the lower end of the outlet pipe. Generally, the first container is in equilibrium at this time. S2. Open the valve, and the liquid to be pressurized enters the second container through the inlet pipe. The total mass of the second container and the liquid inside it gradually increases until it exceeds the mass of the balance block, causing the second container to descend. As the second container descends, the pressure in the space below the annular stop increases, and the liquid to be pressurized in the first container is forced into the outlet pipe (previously, when the initial position of the lower end of the outlet pipe is higher than the initial liquid level in the first container, some gas in the space will also be forced out of the first container through the outlet pipe) and discharged from the upper end of the outlet pipe to the target position. S3. When the second container descends to the position where the top of the limiting post abuts against the cover plate, the cover plate gradually flips upward under the action of the limiting post, making the second container connected to the first container. This allows the liquid to be pressurized in the second container to enter the first container. At this time, the overall mass of the second container and the liquid inside it gradually decreases, the descent rate of the second container decreases, the discharge rate of the outlet pipe decreases, and the buoyancy of the second container increases. When the upper end of the outlet pipe stops discharging liquid (at this time, the overall weight of the second container and the liquid inside it is less than the sum of the weight of the counterweight and the buoyancy of the second container, and it is trending upward), the valve is closed. Under the action of buoyancy and the counterweight, the second container gradually rises above the limiting post. S4. Repeat S2 and S3 to achieve the pressure delivery of the liquid to be pressurized.

[0035] Optionally, the liquid is water or an aqueous solution containing a solute. Optionally, the solute is a fertilizer or other pesticide.

[0036] The liquid pressure conveying device of the present invention realizes the conversion between gravity and buoyancy, and the work done can be converted into energy, thereby realizing the conversion of potential energy, kinetic energy and mechanical energy.

[0037] The liquid pressure conveying device and method of the present invention can form a liquid flow with certain potential and kinetic energy at the upper end of the outlet pipe, which can be used as a new energy source for power generation; it can also save energy consumption in liquid transportation. Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The liquid pressurizing device of the present invention, without the installation of an external power source such as a motor or pump, can pressurize the liquid to be pressurized in batches to the target position by relying on the potential energy or kinetic energy of the liquid itself. A liquid flow with a certain impact energy and potential energy is formed at the upper end of the liquid outlet pipe. The liquid outlet pipe can be connected to a water turbine to further convert the energy of the liquid flow into electrical energy or directly use it for industrial and agricultural production (such as connecting the water turbine to a blower, a flour mill, etc.). Alternatively, the liquid to be pressurized in batches can be pressurized to a target position at a relatively higher position, which helps to save energy consumption and reduce the environmental pollution risk that may be caused by using electromechanical equipment as a power source.

[0038] (2) The liquid pressure conveying device of the present invention can effectively solve the problem of power source shortage. For example, it can be set up next to a water channel to generate electricity from the water pressure in the water channel, or connected to industrial and agricultural production machinery such as pumping fans and flour mills, or to address the inconvenience of transporting low-level liquid to higher positions in areas where energy is not covered (such as fields and seaside). For example, it can be set up next to a water channel to send water pressure at a lower position in the water channel to farmland at a relatively higher position.

[0039] (3) Several sets of liquid pressure conveying devices of the present invention can be connected and combined in sequence to guide the liquid from the low place to the high place step by step.

[0040] (4) In the process of pressurizing liquid, the liquid of the present invention is basically not lost except for a small amount of evaporation.

[0041] (5) The liquid pressure conveying device of the present invention can operate around the clock and can be used both indoors and outdoors. Attached Figure Description

[0042] Figure 1 This is a simplified structural diagram of the liquid pressure conveying device in Embodiment 1 of the present invention, along the AA direction.

[0043] Figure 2 yes Figure 1 Top view of the BB position.

[0044] Figure 3 This is a partially enlarged view of the connection position between the liquid inlet pipe and the second container in Embodiment 1 of the present invention.

[0045] Figure 4 This is a schematic diagram of the assembly relationship between the annular waterstop and the first and second containers in Embodiment 1 of the present invention.

[0046] Figure 5 This is a partial cross-sectional view of the cover plate in the upward flipped state of Embodiment 1 of the present invention (the limiting post is not shown).

[0047] Figure 6 This is a partial top view of the cover plate in the closed state of Embodiment 1 of the present invention.

[0048] Figure 7 This is a simplified structural diagram of the guide mechanism in Embodiment 1 of the present invention.

[0049] Figure 8 This is a simplified structural diagram of another guiding mechanism in this invention.

[0050] Figure 9 This is a simplified structural diagram of the liquid pressure conveying device in Embodiment 2 of the present invention, along the AA direction.

[0051] Figure 10 This is a connection structure diagram of the liquid pressure conveying device and the water turbine in Embodiment 4 of the present invention.

[0052] Figure 11 This is a partial cross-sectional view of another connection position of the cover plate, sealing ring, and second container according to the present invention (the cover plate is in an inverted state).

[0053] Figure 12 yes Figure 11 A partial top view of the connection points of the middle cover plate, sealing ring, and second container.

[0054] Figure 13 This is a schematic diagram of the assembly structure of the limiting rod and the support frame in Embodiment 1 of the present invention.

[0055] Figure 14 This is a simplified structural diagram of the liquid pressure conveying device in Embodiment 5 of the present invention, along the AA direction. Detailed Implementation

[0056] The present invention will be described in detail below with reference to embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. For ease of description, the words "upper," "lower," "left," and "right" appearing below only indicate that they are consistent with the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure.

[0057] Example 1 See Figure 1 and Figure 2The liquid conveying device of this embodiment includes an inlet pipe 4, an outlet pipe 3, a first container 2, a second container 1, a balance rope 12, and a balance block 10. Both the first container 2 and the second container 1 are cylindrical, with open tops. The second container 1 is disposed inside the first container 1. A support frame 15 is provided on the top of the first container 2. The support frame 15 includes a crossbeam fixed to the top of the first container, and a fixed pulley 11 is installed on the crossbeam. The balance rope 12 passes over the fixed pulley 11... The balance rope 12 hangs down at both ends, with one end connected to the top of the second container 1 and the other end detachably connected to the balance block 10. The liquid inlet pipe 4 is movably connected to the second container 1 and is equipped with a valve 14. The inlet end of the liquid inlet pipe 4 is connected to a liquid source 5 (such as a water source). More specifically, the inlet end of the liquid inlet pipe 4 passes through the side wall of the first container 2 and extends into the liquid source 5. The inlet end of the liquid inlet pipe 4 is higher than the inner bottom surface of the second container 1, and the inlet end of the liquid inlet pipe 4 is not lower than the outlet end of the liquid inlet pipe 4. The bottom of the second container 1 has a circular opening 26, which shares a central axis with the second container 1; the inner bottom surface of the second container is hinged to a cover plate 8 that covers the opening 26 via a hinge 25; an upwardly extending limiting post 9 is fixed to the inner bottom surface of the first container 2, and the orthographic projection of the top end of the limiting post 9 on the inner bottom surface of the first container 2 lies within the orthographic projection of the opening on the inner bottom surface of the first container 2; an annular water stop 6 is fixed inside the first container 2, located below the liquid inlet pipe 4, and the annular water stop 6... The inner side of the annular waterstop 6 surrounds and is movably in contact with the outer wall of the second container 1. The outer side of the annular waterstop 6 is sealed and fixedly connected to the first container 2. Thus, the first container, the annular waterstop, and the second container form a relatively closed hydraulic space. The outlet pipe 3 is fixedly connected to the inner wall of the first container 2 via two upper and lower distributed supports 23. The lower end of the outlet pipe 3 communicates with the space below the annular waterstop 6 inside the first container 2, and the upper end of the outlet pipe 3 is located higher than the inlet end of the inlet pipe 4. The upper end of the outlet pipe 3 communicates with the space outside the first container 2.

[0058] See Figure 3 The second container 1 is provided with a groove 17 extending in a vertical direction. The outlet end of the liquid inlet pipe 4 passes through the groove 17 and extends into the second container 1. The liquid inlet pipe 4 and the groove 17 are fitted with a clearance. When the first container 1 descends to the position of abutting against the cover plate 8, the lower end of the groove 17 is higher than the position of the annular water stop 6. At this time, the lower end of the groove 17 is higher than the position of the annular water stop 6.

[0059] See Figure 4The inner side of the annular waterstop 6 is movably and sealingly connected to the outer wall of the second container 1. More specifically, the annular waterstop 6 is made of P-type waterstop rubber. One side of the P-type waterstop rubber with a circular cross-section is movably in contact with the outer wall of the second container 1. The inner wall of the first container 2 is fixed with a first annular pressure plate 21 and a second annular pressure plate 22 distributed vertically. The other side of the P-type waterstop rubber extends between the first annular pressure plate 21 and the second annular pressure plate 22 and abuts against the inner wall of the first container 2 to achieve a sealing connection with the first container 2. The P-type waterstop rubber is fixed between the first annular pressure plate 21 and the second annular pressure plate 22 by fasteners 24 (such as bolts). More preferably, the top surface of the first annular pressure plate 21 is provided with a first reinforcing rib (not shown), and the bottom surface of the second annular pressure plate 22 is provided with a second reinforcing rib (not shown) to further improve the structural stability. The material of the balance block 10 is steel.

[0060] See Figure 5 and Figure 6 The cover plate 8 is provided with a sealing ring 18. The cover plate 8 is circular, and the sealing ring 18 is annular. The sealing ring 18 and the opening 26 share a central axis. When the cover plate 8 covers the inner bottom surface of the second container 1, the sealing ring 18 surrounds the opening 26. As another embodiment, see [link to embodiment]. Figures 11-12 The cover plate 8 is rectangular, and the sealing ring 18 is a rectangular ring. The sealing ring 18 is provided on the inner bottom surface of the second container 1. The sealing ring 18 surrounds the opening 26. When the cover plate 8 covers the inner bottom surface of the second container 1, the cover plate 8 abuts against the sealing ring 18.

[0061] The cover plate 8 is made of steel plate, and the steel plate has a certain weight, which helps to improve the sealing strength when the cover plate 8 covers the bottom surface of the second container 1.

[0062] See Figure 1 The liquid pressurization mechanism further includes a limiting rod 16 fixed to the support frame 15. The lower end of the limiting rod 16 extends into the second container 1. When the lower end of the limiting rod 16 contacts the cover plate on the inner bottom surface of the second container 1, the height of the bottom surface of the second container 1 is not higher than the height of the annular waterstop 6. See also Figure 13 A hole 29 is opened on the crossbeam of the support frame 15, and the limiting rod 16 is engaged with the hole 29. The top of the limiting rod 16 is provided with a nut. Preferably, the hole 29 is a threaded hole, and the limiting rod 16 is provided with an external thread that engages with the hole 29. Thus, the connection between the limiting rod 16 and the support member 15 can be easily realized, and the position height of the lower end of the limiting rod 16 can be easily adjusted to meet the limiting needs of different application scenarios.

[0063] The liquid pressurization mechanism also includes an inlet pipe 19 fixed to the side wall of the first container 2. The inlet pipe 19 communicates with the space below the annular water stop 6 inside the first container 2. The inlet pipe 19 is provided with a first one-way valve 20 that can only be opened towards the inside of the first container 2. The outlet pipe 3 is provided with a second one-way valve 7 that can only be opened towards the upper end of the outlet pipe 3. The second one-way valve 7 is located at the lower end of the outlet pipe 3.

[0064] The liquid pressurization device further includes four guiding mechanisms 13, which are evenly distributed along the outer periphery of the second container 1 and are located above the annular waterstop 6; see also Figure 7 The guiding mechanism 13 includes a bracket 1301, one end of which is fixed to the inner wall of the first container 2. The other end of the bracket 1301 is provided with a rolling mechanism, which includes a shaft and ball bearings 1303. The ball bearings 1303 are mounted on the bracket 1301 via the shaft and abut against the outer wall of the second container 1. The central axis of the ball bearings 1303 (i.e., the central axis of the shaft) is parallel to the horizontal plane. See also... Figure 8 As another implementation, the roller 1302 can be used instead of the ball 1303, and the two have similar effects.

[0065] The method for liquid pressure conveying using the liquid pressure conveying device described above includes the following steps: S1. Initial state of construction: The first container 2 is filled with liquid to be pressurized. The liquid level of the liquid to be pressurized in the first container 2 is higher than the top of the limiting column 9 and not higher than the annular water stop 6. The height of the bottom surface of the second container 1 is not higher than the height of the annular water stop 6. S2. Open valve 14, and the liquid to be pressurized enters the second container 1 through the inlet pipe 4, thereby causing the second container 1 to descend; as the second container 1 descends, the liquid to be pressurized in the first container 2 is forced into the outlet pipe 3 and discharged from the upper end of the outlet pipe 3 to the target position. S3. When the second container 1 descends to the position where the top of the limiting post 9 abuts against the cover plate 8, the cover plate 8 flips upward under the action of the limiting post 9, so that the second container 1 is connected to the first container 2, and the liquid to be pressurized in the second container 1 enters the first container 2; when the liquid outlet pipe 3 stops discharging, the valve 14 is closed, and the second container 1 gradually rises above the limiting post 9. S4. Repeat S2 and S3 to pressurize the liquid in batches. When the amount of liquid to be pressurized has reached the target amount, close valve 14.

[0066] Example 2 Repeat Example 1, except that: see Figure 9The inlet pipe 4 has a flexible section 401, which is located on the upstream side of the second container 1. The flexible section 401 is a corrugated pipe. The flexible section 401 is located between the inner wall of the first container 2 and the second container 1. The pipe section on the downstream side of the flexible section 401 in the inlet pipe 4 is fixedly connected to the second container 1.

[0067] Example 3 Repeat Example 1, except that the lower end of the liquid outlet pipe 3 is located below the top end of the limiting column 9.

[0068] Example 4 Repeat Example 2, except that: see Figure 10 The upper end of the liquid outlet pipe 3 is located lower than the inlet end of the liquid inlet pipe 4. The upper end of the liquid outlet pipe 3 is connected to the water turbine generator 27, and the drain outlet of the water turbine generator 27 is connected to the tailwater pipe 28. Thus, the liquid pressure conveying device and the water turbine generator in this embodiment constitute a water turbine generator set (i.e., an energy conversion device) which can be used for power generation.

[0069] Example 5 Repeat Example 1, except that: see Figure 14 The balance block 10 and the fixed pulley 11 are omitted; the liquid pressure conveying device also includes a spring 30, one end of which is fixed to the crossbeam of the support frame 15, and the other end of which is fixedly connected to the upper end of the balance rope 12.

[0070] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

Claims

1. A liquid pressurization device, characterized in that, The system includes an inlet pipe, an outlet pipe, a first container, a second container, and a balancing rope. The second container is located inside the first container. A support frame is provided on the top of the first container. One end of the balancing rope is connected to the top of the second container. A fixed pulley is installed on the support frame. The balancing rope hangs down at both ends after passing over the fixed pulley, and the other end of the balancing rope is connected to a balance weight. Alternatively, the support frame is provided with an elastic element, one end of which is connected to the support frame, and the other end of which is connected to the other end of the balancing rope. The inlet pipe is movably connected to the second container and is equipped with... A valve; the bottom of the second container has an opening, and a cover plate is hinged to the inner bottom surface of the second container to cover the opening; an upwardly extending limiting post is fixed to the inner bottom surface of the first container, and the projection of the top of the limiting post on the inner bottom surface of the first container is located within the projection of the opening on the inner bottom surface of the first container; an annular water stop is fixed inside the first container, the inner side of the annular water stop surrounds the outer wall of the second container and is movably in contact with the outer wall of the second container, and the outer side of the annular water stop is sealed to the first container; the lower end of the liquid outlet pipe communicates with the space below the annular water stop inside the first container.

2. The liquid pressurization device according to claim 1, characterized in that, The inlet pipe is a flexible pipe, preferably a spiral elastic pipe or a corrugated pipe; Alternatively, the inlet pipe may have a flexible section located upstream of the second container, the flexible section being either a spiral elastic pipe or a corrugated pipe.

3. The liquid pressurization device according to claim 1, characterized in that, The upper end of the outlet pipe is located higher than the inlet end of the inlet pipe; and / or, the lower end of the outlet pipe is located lower than the top of the limiting post.

4. The liquid pressurization device according to claim 1, characterized in that, The second container is provided with a groove extending vertically. The outlet end of the liquid inlet pipe passes through the groove and extends into the second container. The liquid inlet pipe and the groove are fitted with a gap. When the second container descends to the position where the limiting post abuts against the cover plate, the lower end of the groove is higher than the position of the annular water stop. Preferably, the lower end of the groove is 5-30cm higher than the position of the annular water stop.

5. The liquid pressurization device according to any one of claims 1-4, characterized in that, The other end of the balancing rope is detachably connected to the balancing block; and / or, the inner side of the annular waterstop is movably and sealingly connected to the outer wall of the second container; preferably, the balancing block is made of metal or concrete, and the metal is one or more of steel and copper alloys; preferably, the elastic element is a spring.

6. The liquid pressurization device according to any one of claims 1-4, characterized in that, The cover plate is provided with a sealing ring, which surrounds the opening when the cover plate covers the inner bottom surface of the second container; or, the inner bottom surface of the second container is provided with a sealing ring that surrounds the opening, and the cover plate abuts against the sealing ring when the cover plate covers the inner bottom surface of the second container.

7. The liquid pressurization device according to any one of claims 1-4, characterized in that, It also includes a limiting rod fixed to the support frame, the lower end of which extends into the second container. When the lower end of the limiting rod contacts the inner bottom surface or cover of the second container, the height of the bottom surface of the second container is not higher than the height of the annular water stop. And / or, it also includes an inlet pipe, which communicates with the space below the annular water stop in the first container. The inlet pipe is provided with a first one-way valve that can only be opened toward the inside of the first container, and the outlet pipe is provided with a second one-way valve that can only be opened toward the upper end of the outlet pipe. Preferably, the second one-way valve is located at the lower end of the outlet pipe.

8. The liquid pressurization device according to any one of claims 1-4, characterized in that, The second container is cylindrical; the liquid pressurization device further includes multiple guiding mechanisms, which are evenly distributed along the outer periphery of the second container and located above the annular stop; each guiding mechanism includes a support, one end of which is fixed to the inner wall of the first container, and the other end of which is provided with a rolling mechanism, which includes rollers or balls, and the rolling mechanism abuts against the outer wall of the second container, with the central axis of the rolling mechanism parallel to the horizontal plane; preferably, the opening is circular or rectangular and shares a central axis with the second container; and / or, the annular stop is located below the liquid inlet pipe, preferably, the annular stop is made of P-type water-stop rubber, and the side of the P-type water-stop rubber with a circular cross-section is in movable contact with the outer wall of the second container.

9. An energy conversion device, comprising a water turbine, characterized in that, The water inlet of the turbine is connected to the outlet pipe of the liquid pressure conveying device as described in any one of claims 1-8.

10. A liquid pressure delivery method, characterized in that, The process, performed using the liquid pressurization apparatus as described in any one of claims 1-8, includes the following steps: S1. Initial state: The first container is filled with liquid to be pressurized. The liquid level in the first container is higher than the top of the limiting column and not higher than the annular stop. The height of the bottom of the second container is not higher than the height of the annular stop. S2. Open the valve, and the liquid to be pressurized enters the second container through the inlet pipe, thereby causing the second container to descend; as the second container descends, the liquid to be pressurized in the first container is forced into the outlet pipe and discharged from the top of the outlet pipe to the target position. S3. When the second container descends to the position where the top of the limiting post abuts against the cover plate, the cover plate flips upward under the action of the limiting post, so that the second container is connected to the first container, and the liquid to be pressurized in the second container enters the first container; when the liquid stops flowing from the upper end of the outlet pipe, the valve is closed, and the second container gradually rises above the limiting post. S4. Repeat S2 and S3 to achieve the pressure delivery of the liquid to be pressurized.

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