A seawater energy storage device and a seawater desalination system

Abstract

The present application discloses a seawater energy storage device and a seawater desalination system, which relates to the technical field of seawater desalination, wherein the seawater energy storage device comprises an energy storage cylinder, an energy storage piston, an energy storage weight and an energy storage elastic member; the energy storage piston is slidably arranged in the energy storage cylinder, and an energy storage cavity is formed between its bottom surface and the inner wall of the energy storage cylinder; a weight support structure is arranged above the energy storage piston in the energy storage cylinder; the energy storage weight is arranged on the weight support structure; the energy storage elastic member is installed in the energy storage cylinder, and one end is connected to the energy storage piston, and the other end is connected to the energy storage weight; the energy storage cylinder is provided with an inlet end and an outlet end connected to the energy storage cavity. The designed seawater energy storage device can meet both the low-pressure seawater energy storage demand and the high-pressure seawater energy storage demand, and has better applicability and application prospects.

Description

Technical Field

[0001] The present application relates to the technical field of seawater desalination, and in particular to a seawater energy storage device and a seawater desalination system. Background Art

[0002] Desalination, which is the use of seawater to desalinate and produce fresh water, is an open source incremental technology for realizing water resource utilization. It can increase the total amount of fresh water and is not affected by time, space and climate. It can ensure a stable water supply for drinking water for coastal residents and water replenishment for industrial boilers.

[0003] Membrane method (RO) is a commonly used method for seawater desalination. It uses the principle of osmotic pressure. When a pressure greater than the osmotic pressure is applied to the seawater side, the water molecules in the seawater can penetrate through the osmotic membrane to the fresh water side. The ions produced by the salt in the seawater cannot pass through the osmotic membrane due to their large volume, thus separating the water molecules and salt molecules to obtain fresh water.

[0004] In order to reduce the input of transportation cost, the existing desalination systems based on membrane design mostly use local materials on the ocean and utilize the wave energy on the ocean. However, wave energy has the disadvantage of instability. Therefore, in order to be able to output seawater with a certain pressure more consistently, it is often equipped with energy storage devices. There are currently three main energy storage methods used for seawater desalination: airbag energy storage, spring energy storage and heavy-load energy storage. However, airbag energy storage and spring energy storage methods are difficult to meet the energy storage of high-pressure seawater, and the airbag of airbag energy storage is prone to fatigue damage and has a high maintenance cost; although heavy-load energy storage can better adapt to the energy storage of seawater with higher pressure, it is difficult to store energy for low-pressure seawater. Therefore, it is urgent to provide a new solution that can meet both the energy storage needs of low-pressure seawater and the energy storage needs of high-pressure seawater. Summary of the invention

[0005] In view of this, the purpose of this application is to provide a seawater energy storage device and a seawater desalination system, which can meet both the low-pressure seawater energy storage needs and the high-pressure seawater energy storage needs.

[0006] In order to achieve the above technical purpose, the present application provides a seawater energy storage device, including an energy storage cylinder, an energy storage piston, an energy storage weight, and an energy storage elastic member;

[0007] The energy storage piston is slidably disposed in the energy storage cylinder, and an energy storage cavity is formed between the bottom surface of the energy storage piston and the inner wall of the energy storage cylinder;

[0008] A weight support structure is provided in the energy storage cylinder above the energy storage piston;

[0009] The energy storage weight is arranged on the weight support structure;

[0010] The energy storage elastic member is installed in the energy storage cylinder, and one end is connected to the energy storage piston, and the other end is connected to the energy storage weight block;

[0011] The energy storage cylinder body is provided with an inlet end and an outlet end which are connected with the energy storage chamber.

[0012] Further, it also includes a connection component;

[0013] There are multiple energy storage elastic members;

[0014] One end of the connecting assembly is connected to the top surface of the energy storage piston, and the other end is connected to a plurality of the energy storage elastic members.

[0015] Further, the connection assembly includes a connection rod and a connection plate;

[0016] One end of the connecting rod is connected to the top surface of the energy storage piston, and the other end is connected to the bottom surface of the connecting plate;

[0017] A plurality of energy storage elastic members are installed on the top surface of the connection plate.

[0018] Further, the energy storage elastic member is a compression spring;

[0019] The top surface of the connecting plate is provided with a plurality of axial limiting rods into which the energy storage elastic members are inserted one by one;

[0020] The energy storage weight block is provided with limiting holes for the axial limiting rods to be movably inserted into one by one;

[0021] A connecting plate portion is vertically fixed to the other end of the connecting rod;

[0022] The connecting plate portion is connected to the bottom surface of the connecting disk.

[0023] Furthermore, the chamber in the energy storage cylinder is composed of an upper chamber and a lower chamber;

[0024] The upper chamber is connected to the lower chamber via a connecting hole;

[0025] The energy storage piston is movably installed in the lower chamber;

[0026] The weight support structure is disposed in the upper chamber.

[0027] Furthermore, the energy storage cylinder includes a lower cylinder and an upper cylinder;

[0028] The inner cavity of the lower cylinder body forms the lower chamber, and a first through hole is provided on the top for the connecting rod to movably pass through;

[0029] The upper cylinder body is mounted on the top of the lower cylinder body, and its inner cavity forms the upper chamber;

[0030] The bottom of the upper cylinder body is provided with a second through hole for the connecting rod to movably pass through;

[0031] The communicating hole is formed between the first through hole and the second through hole.

[0032] Furthermore, a positioning protrusion is provided around the top of the lower cylinder body and around the first through hole;

[0033] The positioning protrusion can be inserted into the second through hole and fit with the inner wall of the second through hole;

[0034] The connecting plate portion can contact and abut against the positioning protrusion;

[0035] The connection plate can contact and abut against the weight support structure.

[0036] Furthermore, it also includes a first detector and a second detector;

[0037] The first detector is mounted on the energy storage cylinder and is located above the energy storage weight, and is used to detect the position change of the connecting plate;

[0038] The energy storage weight is provided with an avoidance channel for avoiding detection by the first detector;

[0039] The second detector is installed on the energy storage cylinder and located above the energy storage weight, and is used to detect the position change of the energy storage weight.

[0040] Further, the weight support structure includes at least two protrusions circumferentially distributed on the inner peripheral wall of the energy storage cylinder;

[0041] Or the weight support structure is an annular flange arranged on the inner peripheral wall of the energy storage cylinder.

[0042] The present application also discloses a seawater desalination system, including the seawater energy storage device.

[0043] It can be seen from the above technical solutions that the seawater energy storage device designed by the present application combines the energy storage weight and the energy storage elastic member, and the energy storage weight is supported by the weight support structure; when the seawater pressure input at the inlet end is less than the preset value, the seawater pushes the energy storage piston to move and only compresses the energy storage elastic member. This process has the advantages of spring-type energy storage and can meet the energy storage of seawater with a relatively small pressure. As the inlet end continuously inputs seawater and the pressure is greater than the preset value, at this time, since the energy storage elastic member cannot be further compressed, the energy storage piston will push the energy storage weight together with the energy storage elastic member. This process not only has gravitational potential energy but also elastic potential energy. It can meet the energy storage of seawater with a greater pressure than the conventional heavy-load energy storage method. In general, the seawater energy storage device designed by the present application can meet the low-pressure seawater energy storage needs and the high-pressure seawater energy storage needs, and has better applicability and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 A cross-sectional view of a seawater energy storage device provided in this application;

[0046] Figure 2 A partial cross-sectional view of a seawater energy storage device provided in the present application;

[0047] Figure 3 A schematic diagram of a partial structural explosion of a seawater energy storage device provided in this application;

[0048] Figure 4 This is a block diagram of information transmission between a first detector and a second detector of a seawater energy storage device provided in the present application;

[0049] Figure 5 A three-dimensional diagram of a seawater energy storage device provided in this application;

[0050] Figure 6 A schematic diagram of the structure of an energy storage weight block of a seawater energy storage device provided in this application;

[0051] Figure 7 A structural schematic diagram of a seawater energy storage device provided in this application with parameters marked;

[0052] In the figure: 1. energy storage cylinder body; 10. energy storage chamber; 11. lower cylinder body; 111. inlet end; 112. outlet end; 113. first through hole; 114. positioning protrusion; 12. upper cylinder body; 121. second through hole; 2. energy storage elastic member; 3. energy storage weight; 31. limiting hole; 32. avoidance channel; 33. positioning rod; 34. weight unit; 4. weight support structure; 5. energy storage piston; 6. connecting assembly; 61. connecting rod; 611. connecting plate; 62. connecting disk; 63. axial limiting rod; 7. first detector; 8. second detector; 91. first processor; 92. first communication module; 93. second processor; 94. second communication module; 95. client. DETAILED DESCRIPTION

[0053] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection of the embodiments of the present application.

[0054] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0055] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0056] The embodiment of the present application discloses a seawater energy storage device.

[0057] See also Figure 1 , an embodiment of a seawater energy storage device provided in the embodiments of the present application includes:

[0058] Energy storage cylinder 1, energy storage piston 5, energy storage weight 3 and energy storage elastic member 2.

[0059] The energy storage piston 5 is slidably disposed in the energy storage cylinder 1 up and down, and an energy storage chamber 10 is formed between the bottom surface of the energy storage piston 5 and the inner wall of the energy storage cylinder 1 .

[0060] A weight support structure 4 is provided above the energy storage piston 5 in the energy storage cylinder 1 . The energy storage weight 3 is arranged on the weight support structure 4 and is supported and limited by the weight support structure 4 , but can slide freely up and down above the weight support structure 4 .

[0061] The energy storage elastic member 2 is installed in the energy storage cylinder 1 , and one end of the energy storage elastic member 2 is connected to the energy storage piston 5 , and the other end of the energy storage elastic member 2 is connected to the energy storage weight 3 .

[0062] The energy storage cylinder 1 is provided with an inlet end 111 and an outlet end 112 which are connected to the energy storage chamber 10 .

[0063] The seawater energy storage device designed by the present application combines the energy storage weight 3 with the energy storage elastic member 2, and the energy storage weight 3 is supported by the weight support structure 4; when the seawater pressure inputted by the inlet end 111 is less than the preset value, the seawater pushes the energy storage piston 5 to move and only compresses the energy storage elastic member 2. This process has the advantages of spring-type energy storage and can meet the energy storage of seawater with a relatively small pressure. As the inlet end 111 continuously inputs seawater and the pressure is greater than the preset value, at this time, since the energy storage elastic member 2 cannot be further compressed, the energy storage piston 5 will push the energy storage weight 3 together with the energy storage elastic member 2 to move. This process not only has gravitational potential energy but also elastic potential energy. It can meet the energy storage of seawater with a greater pressure than the conventional heavy-load energy storage method. In general, the seawater energy storage device designed by the present application can meet the low-pressure seawater energy storage needs and the high-pressure seawater energy storage needs, and has better applicability and application prospects.

[0064] It should be noted that the substance input through the water inlet does not have to be seawater, but can be any other liquid without limitation.

[0065] The above is an embodiment of a seawater energy storage device provided in the embodiment of the present application. The following is an embodiment of a seawater energy storage device provided in the embodiment of the present application. For details, please refer to Figures 1 to 7 .

[0066] Based on the solution of the above embodiment 1:

[0067] Furthermore, if Figure 1 as well as Figure 2 As shown, in order to facilitate the connection and fixation of the energy storage elastic member 2, a connecting component 6 is additionally designed.

[0068] The energy storage elastic member 2 in the present application is preferably designed to be multiple to improve the energy storage effect. Even if a certain energy storage elastic member 2 fails, there are still other energy storage elastic members 2 to play the role of energy storage, thereby improving the reliability of use.

[0069] One end of the connecting assembly 6 is connected to the top surface of the energy storage piston 5 , and the other end is connected to a plurality of energy storage elastic members 2 .

[0070] Furthermore, if Figure 2 As shown, the connection assembly 6 is designed to include a connection rod 61 and a connection disk 62 .

[0071] One end of the connecting rod 61 is connected to the top surface of the energy storage piston 5 , and the other end is connected to the bottom surface of the connecting disk 62 . A plurality of energy storage elastic members 2 are mounted on the top surface of the connecting disk 62 .

[0072] Furthermore, the energy storage elastic member 2 may be a compression spring. Taking this as an example, in order to limit the axial movement of the energy storage elastic member 2 to ensure the stability of the elastic potential energy: Figure 3 As shown, a plurality of axial limit rods 63 for the energy storage elastic parts 2 to be inserted into one by one are installed on the top surface of the connecting disk 62; the energy storage weight block 3 is provided with limit holes 31 for the axial limit rods 63 to be inserted into one by one; the coil diameter of the energy storage elastic part 2 is larger than the axial limit rods 63 to ensure that the energy storage elastic part 2 can be inserted on the axial phase rod.

[0073] When the energy storage piston 5 moves upward, the axial limiting rod 63 is inserted into the limiting hole 31, and the energy storage elastic part 2 will remain outside the limiting hole 31 and be subjected to the bidirectional pressure between the top surface of the connecting plate 62 and the bottom surface of the energy storage weight 3. At this time, the energy storage elastic part 2 enters the compression energy storage stage.

[0074] The other end of the connecting rod 61 is vertically fixed with a connecting plate portion 611, which can be integrally connected or integrally formed without limitation. The connecting plate portion 611 is connected to the bottom surface of the connecting disk 62. By adding the connecting plate portion 611, the contact area between the connecting rod 61 and the bottom surface of the connecting disk 62 can be increased, thereby making the fixed connection more stable and reliable.

[0075] In this application, the energy storage elastic member 2 can be selected according to different set energy storage limits. If it is required to be particularly sensitive to low pressure, an elastic member that is easily compressed needs to be selected; if it is required to be less sensitive to low pressure and to further increase the energy storage limit of the energy storage elastic member 2, an elastic member that is not easily compressed needs to be selected. Specifically, elastic members (springs) with different stiffness coefficients k can be selected according to actual working conditions or environments and different energy storage limits or sensitivities that are desired to be configured.

[0076] The limiting hole 31 in the present application can be designed as a non-through hole, and the end of the axial limiting rod 63 extending into the limiting hole 31 can contact and abut against one end inside the limiting hole 31. Under this design, the energy storage elastic member 2 can be prevented from being excessively squeezed. When the energy storage elastic member 2 is compressed to near the limit, the axial limiting rod 63 can just contact and abut against one end inside the limiting hole 31.

[0077] Furthermore, the chamber in the energy storage cylinder 1 is designed to consist of an upper chamber and a lower chamber, wherein the upper chamber is connected to the lower chamber via a connecting hole.

[0078] Correspondingly, the energy storage piston 5 is movably installed in the lower chamber, and the weight support structure 4 is arranged in the upper chamber.

[0079] Furthermore, if Figure 1 as well as Figure 2 As shown, the energy storage cylinder 1 is designed to include a lower cylinder 11 and an upper cylinder 12 .

[0080] The lower cylinder body 11 is a hydraulically sealed tank body (which may be composed of a tank body and a detachable tank cover), the inner cavity of which forms a lower chamber, and a first through hole 113 is provided on the top for the connecting rod 61 to movably pass through.

[0081] The upper cylinder body 12 is installed on the top of the lower cylinder body 11, and its inner cavity forms an upper chamber; a second through hole 121 for the connecting rod 61 to movably pass through is provided at the bottom of the upper cylinder body 12; a connecting hole is formed between the first through hole 113 and the second through hole 121.

[0082] The energy storage cylinder 1 adopts a split design, which is more convenient for installation and disassembly, as well as subsequent maintenance.

[0083] Furthermore, if Figure 2 As shown, a positioning protrusion 114 is provided around the first through hole 113 at the top of the lower cylinder body 11; the positioning protrusion 114 can be inserted into the second through hole 121 and fit with the inner wall of the second through hole 121. By designing the positioning protrusion 114, the positioning installation between the upper cylinder body 12 and the lower cylinder body 11 can be quickly achieved, thereby improving the installation convenience.

[0084] The connecting plate portion 611 can contact and abut against the positioning protrusion 114, and the energy storage piston 5 has a lower limit position by virtue of this cooperation; the connecting plate 62 can contact and abut against the weight support structure 4, and the energy storage piston 5 has an upper limit position by virtue of this cooperation. The design of the lower limit position can make the energy storage chamber 10 have a certain space in the initial state, ensuring the conduction between the inlet end 111 and the outlet end 112; the design of the upper limit position can prevent the energy storage weight 3 from moving up excessively and colliding with the energy storage cylinder 1.

[0085] Furthermore, since the energy storage chamber 10 is in a closed state, it is difficult to know the energy storage status inside it. Therefore, in order to timely understand the internal energy storage status, such as Figure 1 as well as Figure 5 As shown, the present application additionally designs a first detector 7 and a second detector 8 .

[0086] The first detector 7 is installed on the energy storage cylinder 1 and located above the energy storage weight 3, and is used to detect the position change of the connecting plate 62; correspondingly, the energy storage weight 3 is provided with an avoidance channel 32 for avoiding detection by the first detector 7; the first detector 7 can be an infrared rangefinder, and there is no specific limitation.

[0087] The second detector 8 is installed on the energy storage cylinder 1 and is located above the energy storage weight 3, and is used to detect the position change of the energy storage weight 3; the second detector 8 can be an ultrasonic detector, which is not specifically limited.

[0088] The information transmission between the first detector 7 and the second detector 8 can be as follows: Figure 4 As shown, first, the first processor 91 collects and processes the detection data of the first detector 7 and the second detector 8 into initial data, and transmits the collected initial data to the second processor 93 through the first communication module 92. The second processor 93 calculates the transmitted initial data to obtain energy storage status data, and then sends the energy storage status data to the client 95 through the second communication module 94. The first processor 91 and the second processor 93 can be STM32 modules, the first communication module 92 can be a Zig Bee communication module, and the second communication module 94 can be a USR-GM3 communication module. The client 95 can be a smart terminal such as a mobile phone or a tablet, and there is no specific limitation.

[0089] Furthermore, a first control valve (not shown) is connected to the inlet end 111, and a second control valve (not shown) is connected to the outlet end 112. The second processor 93 is connected to the first control valve and the second control valve for driving the opening and closing of the first control valve and the second control valve.

[0090] When the second processor 93 determines that the energy storage weight 3 has reached the set maximum energy storage limit according to the obtained energy storage status data, the following control steps may be executed:

[0091] Controlling the first control valve to close and the second control valve to open;

[0092] Alternatively, the first control valve is controlled to be closed while the second control valve remains closed.

[0093] Taking controlling the first control valve to close and the second control valve to open as an example, as the stored energy is continuously released, when the second processor 93 determines that all the energy stored in the energy storage elastic member 2 is released based on the obtained energy storage status data, the second control valve is controlled to close and the first control valve is controlled to open to store energy again; the first detector 7 and the second detector 8 are linked with the first control valve at the inlet end 111 and the second control valve at the outlet end 112 to realize automatic energy storage and release operations.

[0094] like Figure 7 As shown:

[0095] H1 is the installation distance from the top of the upper cylinder body 12 to the bottom of the connecting rod 61 (or to the top of the energy storage piston 5);

[0096] H2 is the installation distance from the second detector 8 to the top of the energy storage weight 3;

[0097] H3 is the installation distance from the first detector 7 to the connection plate 62;

[0098] H4 is the installation distance from the connection plate 62 to the weight support structure 4;

[0099] H5 is the installation distance from the weight support structure 4 to the top of the energy storage weight 3;

[0100] H6 is the installation distance from the bottom of the energy storage piston 5 to the center line of the outlet end 112;

[0101] h1 is the measurement data of the second detector 8;

[0102] h2 is the measurement data of the first detector 7;

[0103] D is the diameter of the energy storage chamber;

[0104] Lifting height of energy storage weight 3: x1=H2-h1

[0105] Compression length of energy storage elastic member 2: x2=H3-h2-H2+h1

[0106] Storage chamber 10 static water height: x3=H3-h2+H6

[0107] The cross-sectional area of ​​the energy storage chamber 10 is:

[0108] Real-time water volume of energy storage chamber 10:

[0109] Gravitational potential energy:

[0110] Elastic potential energy:

[0111] Total energy storage:

[0112] The pressure in the energy storage chamber 10 can be:

[0113] The total energy of the energy storage is converted into pressure energy of the energy storage chamber 10:

[0114]

[0115] The real-time pressure at the outlet 112 of the energy storage chamber 10 can be:

[0116]

[0117] Based on the above calculation formula, the second processor 93 (or other designed control modules) can execute the following program:

[0118] The second processor 93 controls the first control valve to open, and the external seawater enters the energy storage chamber 10 through the inlet port 111 for energy storage. During this period, the second processor 93 obtains the data fed back by the first detector 7 and the second detector 8 and determines whether H3=h2; if the judgment result is no, it is considered that the pre-energy storage stage is over, and the energy storage elastic member 2 is connected to the energy storage state;

[0119] The second processor 93 further determines whether H3>h2; if not, it issues an alarm message (to remind the operator to check the detector); if so, it executes the subsequent determination steps;

[0120] The second processor 93 further determines whether H2=h1; if so, it is considered that the energy storage weight 3 has not yet participated in the energy storage condition; if not, it is considered that the energy storage elastic member 2 has reached the limit and the energy storage weight 3 participates in the energy storage condition;

[0121] The second processor 93 further determines whether H2>h1; if not, it issues an alarm message (to remind the operator to check the detector); if so, it executes the subsequent determination steps;

[0122] The second processor 93 further determines whether h2=H2+H5; if not, it is considered that the energy storage weight 3 has not reached the energy storage limit, and the first control valve can be kept open to continue energy storage; if so, it is considered that the energy storage weight 3 has reached the energy storage limit;

[0123] When the second processor 93 determines that the energy storage weight 3 has reached the energy storage limit, the first control valve and the second control valve can be controlled as follows:

[0124] 1. The first control valve is closed, the second control valve is closed, energy storage is stopped, and energy storage is realized;

[0125] 2. The first control valve remains open, and the second control valve opens, storing energy while gradually releasing it;

[0126] 3. The first control valve is closed and the second control valve is opened to release energy;

[0127] Take the above 2 / 3 point energy release control as an example:

[0128] As the energy is released, the energy storage weight 3 begins to drop, and h1 slowly increases. The second processor 93 determines whether h1 < H2; if so, it is considered that the energy of the energy storage weight 3 has not been completely released; if not, the subsequent determination steps are executed;

[0129] The second processor 93 further determines whether h1=H2; if not, an alarm message is issued (to remind the operator to check the detector); if so, the energy of the energy storage weight 3 is deemed to be completely released, and subsequent determination steps are executed;

[0130] The second processor 93 further determines whether h2<H2+H5+H4; if so, it is considered that the energy of the energy storage elastic member 2 has not been completely released; if not, the subsequent determination steps are executed;

[0131] The second processor 93 further determines whether h2=H2+H5+H4; if not, an alarm message is issued (to remind the operator to check the detector); if so, the energy of the energy storage elastic member 2 is deemed to be completely released, and the first control valve is controlled to open and the second control valve is controlled to close (or the second control valve remains open).

[0132] Furthermore, the weight support structure 4 includes at least two protrusions circumferentially distributed on the inner circumferential wall of the energy storage cylinder 1;

[0133] Or the weight support structure 4 is an annular flange arranged on the inner peripheral wall of the energy storage cylinder body 1.

[0134] Furthermore, the weight support structure 4 can be a latch structure, and the energy storage cylinder 1 is provided with a plurality of holes at different heights, and the latch structure can be movably inserted into the holes at the corresponding heights, so that the height position of the weight support structure 4 can be adjusted, thereby making the upper limit point of the energy storage piston 5 adjustable, and the upper limit point of the energy storage piston 5 can be adjusted specifically according to the required hydraulic energy storage limit. For example, when it is necessary to further increase the hydrostatic pressure (hydrostatic pressure refers to the pressure P=ρgh generated by the top of the water on the bottom caused by the water level itself) and the energy storage volume, the limit point is adjusted higher. The adjustment of the lower limit point can also be designed to be adjustable. Taking the design of the positioning protrusion 114 as an example, the positioning protrusion 114 can be replaced by an external threaded tube, and the inner wall of the first through hole 113 is provided with an internal thread structure threadedly connected to the external threaded tube. The external threaded tube can be used to adjust the height of the end of the external threaded tube protruding from the first through hole 113, thereby adjusting the height at which the connecting plate portion 611 can contact and resist it, thereby realizing the adjustment of the lower limit point of the energy storage piston 5 (the lower limit point is increased, more seawater or liquid can be stored in the bottom cavity, so that the overall energy storage capacity is increased). Those skilled in the art can make appropriate changes in design based on this without limitation.

[0135] like Figure 6 As shown, the energy storage weight 3 of the present application can be designed with adjustable weight. Specifically, with reference to the dumbbell design, it can include a positioning rod 33 and a plurality of weight units 34 sleeved on the positioning rod 33. By adding, subtracting or replacing weight units 34 of different masses for combination, energy storage weights 3 of different weights can be obtained. A nut sleeve (not shown in the figure) can be threadedly sleeved on the positioning rod 33 to clamp and fix the weight unit 34.

[0136] The energy storage process of the seawater energy storage device designed in this application is as follows:

[0137] 1. In the initial state, the connecting plate portion 611 contacts the positioning protrusion 114 so that the energy storage piston 5 is in the lower limit position; the inlet end 111 starts to flow water to charge the energy storage chamber 10. As the energy storage chamber 10 is slowly filled, the energy storage piston 5 is pushed upward. When the energy storage piston 5 moves upward, it drives the connecting rod 61 and the connecting plate 62 upward, thereby compressing the energy storage elastic member 2, and entering the energy storage stage of compressing the energy storage elastic member 2;

[0138] 2. When the connecting plate 62 moves up again and the energy storage elastic member 2 cannot be further compressed, the pressure of the connecting rod 61 on the connecting plate 62 will be transmitted to the energy storage weight 3. At this time, the energy storage elastic member 2 moves up together with the energy storage weight and reaches the upper limit position when the connecting plate 62 contacts the weight support structure 4, that is, the energy storage limit is reached.

[0139] The present application also discloses a seawater desalination system, including the seawater energy storage device of the above-mentioned embodiment 1 or embodiment 2.

[0140] The above is a detailed introduction to a seawater energy storage device and a seawater desalination system provided by the present application. For a person skilled in the art, according to the idea of ​​the embodiments of the present application, there may be changes in the specific implementation method and the scope of application. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A seawater energy storage device, characterized in that: It comprises an energy storage cylinder (1), an energy storage piston (5), an energy storage weight (3) and an energy storage elastic member (2); The energy storage piston (5) is slidably disposed in the energy storage cylinder (1), and an energy storage chamber (10) is enclosed between its bottom surface and the inner wall of the energy storage cylinder (1); A weight support structure (4) is provided above the energy storage piston (5) in the energy storage cylinder (1); The energy storage weight (3) is arranged on the weight support structure (4); The energy storage elastic member (2) is installed in the energy storage cylinder (1), and one end is connected to the energy storage piston (5), and the other end is connected to the energy storage weight block (3); The energy storage cylinder (1) is provided with an inlet end (111) and an outlet end (112) which are connected to the energy storage chamber (10); Also included is a connection component (6); One end of the connecting assembly (6) is connected to the top surface of the energy storage piston (5), and the other end is connected to the plurality of energy storage elastic members (2); The connecting assembly (6) comprises a connecting rod (61) and a connecting plate (62); One end of the connecting rod (61) is connected to the top surface of the energy storage piston (5), and the other end is connected to the bottom surface of the connecting plate (62); Also includes a first detector (7) and a second detector (8); The first detector (7) is mounted on the energy storage cylinder (1) and is located above the energy storage weight (3), and is used to detect position changes of the connection plate (62); The second detector (8) is mounted on the energy storage cylinder (1) and is located above the energy storage weight (3), and is used to detect position changes of the energy storage weight (3); Also includes a first processor (91) and a second processor (93); The first processor (91) collects and processes the detection data of the first detector (7) and the second detector (8) into initial data, and transmits the collected initial data to the second processor (93) through the first communication module (92); The second processor (93) calculates the transmitted initial data to obtain energy storage status data; The inlet end (111) is connected to a first control valve; The outlet end (112) is connected to a second control valve; The second processor (93) is connected to the first control valve and the second control valve, and is used to drive the first control valve and the second control valve to open and close; When the second processor (93) determines that the energy storage weight (3) has reached a set maximum energy storage limit based on the obtained energy storage status data, it controls the first control valve to close and the second control valve to open, or controls the first control valve to close and the second control valve to remain closed.

2. The seawater energy storage device according to claim 1, characterized in that: The energy storage elastic members (2) are multiple.

3. The seawater energy storage device according to claim 2, characterized in that: A plurality of the energy storage elastic members (2) are mounted on the top surface of the connection plate (62).

4. The seawater energy storage device according to claim 3, characterized in that: The energy storage elastic member (2) is a compression spring; A plurality of axial limiting rods (63) are mounted on the top surface of the connecting plate (62) and are inserted into the energy storage elastic members (2) in a one-to-one correspondence. The energy storage weight block (3) is provided with a limiting hole (31) into which the axial limiting rods (63) are movably inserted in a one-to-one correspondence; A connecting plate portion (611) is vertically fixed to the other end of the connecting rod (61); The connecting plate portion (611) is connected to the bottom surface of the connecting disk (62).

5. The seawater energy storage device according to claim 4, characterized in that: The chamber in the energy storage cylinder (1) consists of an upper chamber and a lower chamber; The upper chamber is connected to the lower chamber via a connecting hole; The energy storage piston (5) is movably mounted in the lower chamber; The weight support structure (4) is arranged in the upper chamber.

6. The seawater energy storage device according to claim 5, characterized in that: The energy storage cylinder (1) comprises a lower cylinder (11) and an upper cylinder (12); The inner cavity of the lower cylinder body (11) forms the lower chamber, and a first through hole (113) is provided on the top for the connecting rod (61) to movably pass through. The upper cylinder body (12) is mounted on the top of the lower cylinder body (11), and its inner cavity forms the upper chamber; A second through hole (121) is provided at the bottom of the upper cylinder body (12) for the connecting rod (61) to movably pass through; The communicating hole is formed between the first through hole (113) and the second through hole (121).

7. The seawater energy storage device according to claim 6, characterized in that: A positioning protrusion (114) is provided at the top of the lower cylinder body (11) around the first through hole (113); The positioning protrusion (114) can be inserted into the second through hole (121) and fits against the inner wall of the second through hole (121); The connecting plate portion (611) is capable of contacting and abutting against the positioning protrusion (114); The connection plate (62) is capable of contacting and abutting against the weight support structure (4).

8. The seawater energy storage device according to claim 7, characterized in that: The energy storage weight (3) is provided with an avoidance channel (32) for avoiding detection by the first detector (7).

9. The seawater energy storage device according to claim 1, characterized in that: The weight support structure (4) comprises at least two protrusions circumferentially distributed on the inner circumferential wall of the energy storage cylinder (1); Alternatively, the weight support structure (4) is an annular flange arranged on the inner peripheral wall of the energy storage cylinder (1).

10. A seawater desalination system, characterized in that: It comprises the seawater energy storage device as described in any one of claims 1 to 9.

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