Gravity water pumping device

Abstract

The invention discloses a gravity water pumping device which comprises a tubular pump body communicated with the atmosphere and a piston arranged in the pump body and capable of reciprocating along the axis of the pump body. A water inlet and a water outlet are formed in the pump body, and the water outlet is higher than the water inlet; fluid can flow into the pump body through the water inlet by utilizing gravity; when the piston moves along the pump body, fluid in the pump body can be pushed from one end of the water inlet to one end of the water outlet, so that the fluid flows out of the pump body through the water outlet under the action of gravity. According to the principle of the linear piston pump, automatic water feeding and discharging are achieved through gravity, compared with an existing linear piston pump using negative pressure water feeding and positive pressure water discharging, a one-way valve does not need to be arranged in the water feeding and water discharging switching process to guarantee the flow direction of water, and therefore the structure of the whole water pumping device is simpler and more reliable.

Description

Technical Field

[0001] The invention relates to the field of water pumping, and in particular to a gravity water pumping device. Background Art

[0002] With the development of electromagnetics, the functions and applications of traditional permanent magnets have received attention, and permanent magnets and current-carrying coils as magnetic sources have also received attention. At the same time, the cross-integration of magnetism with multiple disciplines is inevitable, such as microfluid chemical analysis systems, artificial blood pumps for the treatment of myocardial infarction, and micro-drug injection systems. The emergence of electromagnets has made the working form of magnetic sources more diverse. The existence state of the magnetic field can be instantly changed by the supply of current. This feature has spawned many emerging applications.

[0003] For a long time, people have never stopped pursuing and exploring pumps, and various types of pumps have emerged one after another, such as centrifugal pumps, submersible pumps, and micro pumps. These pumps have their own characteristics and also undertake various types of tasks, such as pumping a fixed amount of liquid within a fixed time, completing pumping tasks in a specific acid-base environment, etc. Prior art Chinese patent application CN201220368745.X discloses an electromagnetic linear piston pump, comprising a piston body, a cylinder body and an electromagnetic coil, wherein the cylinder body is in the shape of a polygon, and columnar cavities are arranged at both ends of the cylinder body, the piston body is arranged inside the cylinder body, and the two ends of the piston body are closely matched with the columnar cavity liquid at both ends, and a group of electromagnetic components are arranged on at least one side of the cylinder body, and the electromagnetic components include an inner magnetic conductive plate and an outer magnetic conductive plate arranged parallel to the side of the cylinder body, and an inner excitation coil and an outer excitation coil respectively mounted on the inner magnetic conductive plate and the outer magnetic conductive plate, and the inner magnetic conductive plate and the outer magnetic conductive plate are linked with the piston body.

[0004] In the above-mentioned prior art, a check mechanism needs to be provided to prevent liquid from flowing back, which increases the device complexity, processing difficulty and cost of the magnetic fluid micropump. Summary of the invention

[0005] In view of this, the present invention provides a gravity water pumping device, which uses gravity to pump water in and out, does not require a check valve and will not cause backflow. In order to solve the above technical problems, the technical solution of the present invention is to adopt a gravity water pumping device, including a tubular pump body connected to the atmosphere and a piston arranged in the pump body and capable of reciprocating along the axis of the pump body; a water inlet and a water outlet are arranged on the pump body, and the water outlet is located higher than the water inlet; the fluid can flow into the pump body through the water inlet by gravity; when the piston moves along the pump body, the fluid in the pump body can be pushed from one end of the water inlet to the other end of the water outlet, so that the fluid flows out of the pump body through the water outlet by gravity.

[0006] As an improvement, the water inlet and the water outlet are respectively connected with a water inlet pipe and a water outlet pipe in an inclined manner, and the water inlet pipe and the water outlet pipe are in opposite directions to the inclined direction.

[0007] As an improvement, the piston may pause at the water outlet when pushing the liquid toward one end of the water outlet. As a further improvement, the top surface of the piston is not higher than the position of the water inlet in the initial position; when the piston is paused at the water outlet position, its top surface is flush with the water outlet; and the length of the piston is not less than the distance between the water inlet and the water outlet. As another further improvement, it also includes a driving device for driving the piston to move; the driving device includes a driving electromagnetic coil mounted outside the pump body and located below the water inlet, and the piston is at least partially a permanent magnet; when the driving electromagnetic coil is energized, the piston moves along the pump body under the action of electromagnetic force.

[0008] As an improvement, it also includes a capture electromagnetic coil mounted outside the pump body and located at the water outlet position. The electromagnetic force generated by the capture electromagnetic coil is attracted by the permanent magnet, so that when the piston moves to the water outlet position, it can be attracted by the electromagnetic force generated by the capture electromagnetic coil and thus pause at the water outlet position.

[0009] As an improvement, magnetic fluid is filled between the piston and the bottom of the pump body.

[0010] As an improvement, the driving electromagnetic coils are arranged in several groups along the axial direction of the pump body, and two groups form a team; the height of each group of driving electromagnetic coils is 1 / 2 of the permanent magnet, and the two groups of driving electromagnetic coils in each team are wound in opposite directions and are connected in series in the AC power supply.

[0011] As an improvement, the inner cavity of the pump body and the piston are both cylindrical.

[0012] As an improvement, a vent hole is provided on the pump body above the water outlet; the length of the piston is not less than the distance between the water inlet and the water outlet; the distance between the water inlet and the water outlet is not greater than the distance between the water outlet and the vent hole.

[0013] As an improvement, the vent hole is arranged on the top of the pump body.

[0014] The present invention is beneficial in that: The electromagnetically accelerated gravity water pumping device provided by the present invention has a driving device that designs a pumping structure based on the electromagnetic acceleration and gravity principles. In the cylindrical pump body, there is a height difference between the inlet and the outlet, so that the fluid at a low place can be pumped to a high place. The electromagnet array below continuously provides an accelerating driving force to the cylindrical permanent magnet within a certain area, which can achieve the effect of pumping a large amount of fluid to a high place at one time. There is no backflow phenomenon between the devices, and no check valve with a complex structure and difficult processing is set, and the pumping process is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 Schematic diagram of the magnetic change of the driving electromagnetic coil from state (1) to state (4) during the process of driving the piston.

[0017] Markings in the figure: 101. Pump body; 102. Water outlet pipe; 103. Water inlet pipe; 104. Capture electromagnetic coil; 105. Piston; 106. Magnetic fluid; 201. Drive electromagnetic coil. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0019] like Figure 1 As shown, the present invention provides a gravity water pumping device, comprising a tubular pump body 101 communicated with the atmosphere and a piston 105 arranged in the pump body 101 and capable of reciprocating along the axis of the pump body 101; a water inlet and a water outlet are arranged on the pump body 101, and the water outlet is located higher than the water inlet; the fluid can flow into the pump body 101 through the water inlet by gravity; when the piston 105 moves along the pump body 101, the fluid in the pump body 101 can be pushed from one end of the water inlet to one end of the water outlet, so that the fluid flows out of the pump body through the water outlet by gravity.

[0020] The principle of the present invention is to achieve automatic water inlet and outlet through gravity. Compared with the existing linear piston pump that uses negative pressure water inlet and positive pressure water outlet, there is no need to set a one-way valve to ensure the flow direction of water during the switching process of water inlet and water outlet, thereby making the structure of the entire water pumping device simpler and more reliable.

[0021] In the initial state, the external fluid enters the pump body 101 by gravity, specifically between the water inlet and the water outlet in the pump body. The piston 105 in the pump body 101 is driven to move, and the piston 105 pushes the fluid in the pump body 101 toward the water outlet. When the fluid reaches the water outlet, it will flow out of the pump body 101 under the action of gravity, thereby achieving the purpose of conveying the fluid.

[0022] In order to achieve the purpose of "fluid can flow into the pump body through the water inlet by gravity" and "fluid flows out of the pump body through the water outlet by gravity" in this embodiment, an inlet pipe 103 and an outlet pipe 102 are connected obliquely to the water inlet and the water outlet, respectively, and the inlet pipe 103 and the outlet pipe 102 are inclined in opposite directions. Specifically, the inlet pipe 103 is inclined upward so that the height of the fluid that needs to flow into the pump body 101 is higher than the position of the water inlet. The outlet pipe 102 is inclined downward so that the destination height of the fluid that needs to flow out of the pump body 101 is lower than the position of the water outlet. Of course, other pipeline arrangements are also possible, as long as the fluid can flow into and out of the pump body by gravity.

[0023] In addition, since the water is discharged only by gravity, the flow rate of the fluid pumped out is relatively slow. In order to ensure that the fluid in the pump body 101 can completely flow out of the pump body 101, the piston 105 in this embodiment can pause at the water outlet when pushing the liquid to one end of the water outlet. In other words, after pushing the fluid to the water outlet, the piston 105 does not fall back immediately, but will pause at the water outlet for a period of time (the time is set according to the specific situation) so that the fluid in the pump body 101 is completely discharged from the water outlet before falling back.

[0024] This embodiment also includes a driving device for driving the piston 105 to move; the driving device includes a driving electromagnetic coil 201 mounted outside the pump body 101 and located below the water inlet, and the piston 105 is at least partially a permanent magnet; when the driving electromagnetic coil 201 is energized, the piston 105 moves along the pump body 101 under the action of electromagnetic force.

[0025] When the electromagnetic coil is energized, a Lorentz force is generated between the electromagnetic coil and the permanent magnet, causing the electromagnetic coil and the permanent magnet to repel or attract each other. In the present invention, by adjusting the energizing direction of the electromagnetic coil, a repulsive force is generated between the electromagnetic coil and the permanent magnet and the repulsive force is used as the driving force for the piston to move. It is foreseeable that in order to increase the thrust, the entire piston can be made of a permanent magnet.

[0026] In other embodiments, in order to further improve the power of the piston, the driving electromagnetic coils 201 are arranged in several groups along the axial direction of the pump body 101, and two groups form a team; the height of each group of driving electromagnetic coils 201 is 1 / 2 of the permanent magnet, and the two groups of driving electromagnetic coils 201 in each team are wound in opposite directions and connected in series in the AC power supply to generate magnetic forces in different directions. When the permanent magnet moves into the range of a certain group of driving electromagnetic coils 201, the driving electromagnetic coil 201 repels the permanent magnet, while the driving electromagnetic coil 201 located above the permanent magnet attracts the permanent magnet.

[0027] In this embodiment, the inner cavity of the pump body 101 and the piston 105 are both cylindrical. For a cylindrical permanent magnet, half of its height is the South Pole (S) and the other half is the North Pole (N). In order to maximize the repulsive force, both the South Pole and the North Pole need to bear the repulsive force. Therefore, in this embodiment, the height of the driving electromagnetic coil 201 is 1 / 2 of the permanent magnet and the winding direction is opposite. When the power is turned on, it can meet the requirement that both the South Pole and the North Pole of the piston are subjected to the repulsive force. In this embodiment, the driving electromagnetic coil 201 is connected to alternating current, that is, the direction of the current can be continuously changed, so that the magnetism of the coil changes accordingly. Using this law, The present invention can also set the frequency of current change according to the speed of piston movement, so that when the permanent magnet moves into a certain electromagnetic coil range, the electromagnetic coil and the permanent magnet repel each other.

[0028] like Figure 2 As shown, state (1) to state (4) show the change of magnetism of the driving electromagnetic coil 201 in the process of driving the piston to move. It can be seen that the permanent magnet is repelled by the driving electromagnetic coil 201 around it and attracted by the driving electromagnetic coil above it, so that the permanent magnet gradually accelerates to rise.

[0029] In order to achieve the purpose of pausing the piston 105 at the water outlet, the present invention also includes a capture electromagnetic coil 104 sleeved outside the pump body 101 at the water outlet. The electromagnetic force generated by the capture electromagnetic coil 104 is attracted by the permanent magnet, so that when the piston 105 moves to the water outlet, it can be attracted by the electromagnetic force generated by the capture electromagnetic coil 104 and pause at the water outlet. Since the capture electromagnetic coil 104 only needs to attract the permanent magnet, its magnetic field does not need to change, so it is connected to a DC power supply.

[0030] In order to ensure that the fluid can smoothly flow into the pump body 101 without being blocked by the piston 105, the top surface of the piston 105 is not higher than the position of the water inlet in the initial position. The initial position refers to the position where the piston 105 retreats to the position waiting for water to enter.

[0031] In order to ensure that the fluid can flow out of the pump body 101 smoothly without being blocked by the piston 105, when the water outlet position of the piston 105 is paused, its top surface is flush with the water outlet, ensuring that the lowest water level during the pause is flush with the water outlet, so that all the fluid can be at least higher than the water outlet.

[0032] In order to ensure that other fluids do not enter the pump body 101 when pushing the fluid, the length of the piston 105 is not less than the distance between the water inlet and the water outlet. In other words, during the pushing process, the piston 105 always closes the water inlet to prevent the fluid from entering the bottom of the piston 105, thereby causing water accumulation at the bottom of the pump body 101 and affecting the piston's retreat. In order to further achieve the purpose of sealing, a magnetic fluid 106 is filled between the piston 105 and the bottom of the pump body 101. The magnetic fluid 106 can form a sealing ring between the piston 105 and the inner cavity of the pump body 101 under the action of magnetic force to prevent the fluid from entering. Of course, a valve can also be directly set on the water inlet pipe 103 to avoid the above problems.

[0033] In order to better achieve the purpose of pumping water, it is foreseeable that the pump body 101 can be arranged vertically, and a vent hole is arranged on the pump body 101 above the water outlet so that the inner cavity of the pump body 101 is connected to the atmosphere. In order to fully utilize the length of the pump body 101, the vent hole is arranged on the top of the pump body 101. In order to prevent the fluid from overflowing during the pushing process, the distance between the water inlet and the water outlet (the maximum single pumping amount) is not greater than the distance between the water outlet and the vent hole.

[0034] In this embodiment, the pump body 101 may be made of a transparent non-magnetic material, such as glass.

[0035] When working, the piston 105 is in the initial position, and its top surface is not higher than the water inlet. The fluid enters the pump body 101 from the container under the action of gravity. The driving electromagnetic coil 201 is energized, and the piston 105 is driven to move upward by the Lorentz force, thereby pushing the fluid in the pump body 101 to the upper (water outlet) end. When the piston 105 moves to the same position as the water outlet, it is adsorbed by the capture electromagnetic coil 104, causing the piston 105 to pause. At this time, the liquid flow in the pump body 101 flows out of the pump body 101 through the water outlet under the action of gravity. After the fluid is completely discharged, the capture electromagnetic coil 104 is de-energized, and the piston 105 falls back to the initial position under the action of gravity.

[0036] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gravity water pumping device, characterized in that: It includes a tubular pump body communicated with the atmosphere and a piston arranged in the pump body and capable of reciprocating along the axis of the pump body; the pump body is provided with a water inlet and a water outlet, and the water outlet is located higher than the water inlet; the fluid can flow into the pump body through the water inlet by gravity; when the piston moves along the pump body, it can push the fluid in the pump body from one end of the water inlet to the other end of the water outlet, so that the fluid flows out of the pump body through the water outlet by gravity.

2. A gravity water pumping device according to claim 1, characterized in that: The water inlet and the water outlet are respectively connected with a water inlet pipe and a water outlet pipe in an inclined manner, and the water inlet pipe and the water outlet pipe are in opposite directions of the inclination.

3. A gravity water pumping device according to claim 1, characterized in that: When the piston pushes the liquid toward one end of the water outlet, it can pause at the water outlet position.

4. A gravity water pumping device according to claim 3, characterized in that: The top surface of the piston is not higher than the water inlet in the initial position; when the piston is suspended at the water outlet position, its top surface is flush with the water outlet; the length of the piston is not less than the distance between the water inlet and the water outlet.

5. A gravity water pumping device according to claim 3, characterized in that: It also includes a driving device for driving the piston to move; the driving device includes a driving electromagnetic coil sleeved outside the pump body and located below the water inlet, and the piston is at least partially a permanent magnet; when the driving electromagnetic coil is energized, the piston moves along the pump body under the action of electromagnetic force.

6. A gravity water pumping device according to claim 5, characterized in that: It also includes a capture electromagnetic coil mounted outside the pump body and located at the water outlet position. The electromagnetic force generated by the capture electromagnetic coil is attracted by the permanent magnet, so that when the piston moves to the water outlet position, it can be attracted by the electromagnetic force generated by the capture electromagnetic coil and pause at the water outlet position.

7. A gravity water pumping device according to claim 5, characterized in that: The space between the piston and the bottom of the pump body is filled with magnetic fluid.

8. A gravity water pumping device according to claim 5, characterized in that: The driving electromagnetic coils are arranged in several groups along the axial direction of the pump body, and two groups form a team; the height of each group of driving electromagnetic coils is 1 / 2 of the permanent magnet, and the two groups of driving electromagnetic coils in each team are wound in opposite directions and are connected in series in the AC power supply.

9. A gravity water pumping device according to claim 1, characterized in that: The pump body is provided with an air vent above the water outlet; the length of the piston is not less than the distance between the water inlet and the water outlet; the distance between the water inlet and the water outlet is not greater than the distance between the water outlet and the air vent.

10. A gravity water pumping device according to claim 9, characterized in that: The vent hole is arranged on the top of the pump body.

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