Wave energy hydraulic energy conversion system with function of preventing continuous oil leakage

Abstract

In order to enable a wave energy device hydraulic energy conversion system to automatically cut off an oil way of an oil suction port and reduce marine pollution caused by hydraulic oil after a hydraulic cylinder rubber pipe leaks or bursts, the invention discloses a wave energy hydraulic energy conversion system with a function of preventing continuous oil leakage. Comprising an acting oil cylinder, a common one-way valve, an oil suction pipe, a pressure oil tank, a two-position two-way valve, a hydraulic control one-way valve, an oil discharge pipe, a cartridge valve and an energy accumulator. According to the wave energy hydraulic energy conversion system, whether the hydraulic rubber pipe on the hydraulic cylinder leaks or not can be automatically judged according to the pressure in the hydraulic pipeline, and the oil way of the oil suction port of the hydraulic cylinder is automatically cut off, so that the hydraulic cylinder is disconnected from the hydraulic system, the leakage amount of hydraulic oil is reduced, and the safety of the hydraulic energy conversion system is ensured.

Description

Technical Field

[0001] The invention relates to a hydraulic energy conversion and control system for a wave energy power generation device, and in particular to a wave energy hydraulic energy conversion system with a function of preventing continuous oil leakage. Background Art

[0002] As a clean and renewable energy source, ocean wave energy has attracted the attention of many coastal countries, and more and more countries have stepped up their research and development of wave energy technology. The main way to use wave energy is to generate electricity. General wave energy power generation devices can be divided into energy capture systems and energy conversion systems, among which the most commonly used energy conversion system is hydraulic conversion.

[0003] The working principle of the conventional hydraulic energy conversion system is as follows: driven by waves, the wave-absorbing float drives the hydraulic cylinder installed with it to perform reciprocating motion. During the reciprocating motion, the hydraulic cylinder sucks hydraulic oil from the oil tank and then outputs it to the high-pressure accumulator group. After the hydraulic oil is stored in the accumulator, it reaches the set pressure and releases the high-pressure hydraulic oil to drive the hydraulic motor and generator set to generate electricity.

[0004] The process of the hydraulic cylinder sucking in and out hydraulic oil is achieved through a pair of one-way valves. Since the hydraulic cylinder always follows the movement of the wave-absorbing float or base when sucking and discharging oil, especially some wave energy devices that use the pitch mode of the float to do work, the hydraulic cylinder will also have a certain swing angle. Therefore, the oil pipe connecting the two one-way valves on the hydraulic cylinder must use a rubber hose with a certain range of motion.

[0005] Due to the action of waves, the hydraulic cylinder will keep reciprocating. In the state of non-stop movement at all times, the hydraulic hose connected to the one-way valve on the hydraulic cylinder becomes the weak link of the hydraulic energy conversion system of the entire wave energy device, including the oil suction hose that sucks oil from the oil tank and the high-pressure hose leading to the accumulator. There is a risk of hose loosening or bursting, which leads to hydraulic oil leakage. After the leakage, since the hydraulic cylinder is still driven by the waves, it will continue to suck oil from the oil tank and transport it to the high-pressure hose, so it will gradually leak all the hydraulic oil in the oil tank, causing the sea surface to be polluted by a large amount of hydraulic oil. In addition, after the hydraulic oil leaks, if the hydraulic cylinder is installed underwater, a large amount of seawater will enter the system, which will cause damage to other components of the hydraulic conversion system. Therefore, how to automatically cut off the oil suction port oil circuit of the wave energy device hydraulic energy conversion system after the hydraulic cylinder hose leaks or bursts, reduce the pollution of hydraulic oil to the ocean, and ensure that the hydraulic energy conversion line system of the wave energy device is not lost has become an urgent problem to be solved in wave energy power generation technology. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage. The wave energy hydraulic energy conversion system can independently determine whether the hydraulic hose on the hydraulic cylinder is leaking through the pressure in the hydraulic pipeline, and automatically cut off the oil circuit of the hydraulic cylinder suction port, thereby disconnecting the hydraulic cylinder from the hydraulic system, reducing the amount of hydraulic oil leakage and ensuring the safety of the hydraulic energy conversion system.

[0007] To achieve the above object, the technical solution of the present invention is:

[0008] A wave energy hydraulic energy conversion system with a function of preventing continuous oil leakage, comprising a working oil cylinder, a common one-way valve, an oil suction pipe, a pressure oil tank, a two-position two-way valve, a hydraulically controlled one-way valve, an oil discharge pipe, a cartridge valve and an accumulator;

[0009] The two-position two-way valve includes three ports, namely a pilot oil port, an inlet port and an outlet port;

[0010] The cartridge valve includes three ports, distributed as an inlet end, an outlet end and a rear end;

[0011] The pressure oil tank is provided with an oil suction port;

[0012] The hydraulic actuator comprises an actuator cylinder barrel and an actuator cylinder piston rod, wherein the actuator cylinder piston rod is installed in the actuator cylinder barrel to divide the actuator cylinder barrel into an actuator cylinder rodless chamber and an actuator cylinder rod chamber;

[0013] The working cylinder comprises a cylinder barrel and a piston rod installed in the cylinder barrel, and the area where the piston rod is located in the cylinder barrel is a rod chamber; the rod chamber is respectively connected to one end of the common one-way valve and the hydraulic one-way valve;

[0014] The other end of the ordinary one-way valve is connected to one end of the oil suction pipe, and the other end of the oil suction pipe is divided into two paths, one path is connected to one end of the control ball valve, and the other path is connected to the pilot oil port of the two-position two-way valve;

[0015] The other end of the control ball valve is connected to the oil suction port of the pressure oil tank; the control ball valve is driven to open and close by the hydraulic actuator;

[0016] The other end of the hydraulically controlled one-way valve is connected to one end of the oil drain pipe, and the other end of the oil drain pipe is divided into two paths, one of which is connected to the inlet end of the cartridge valve, and the other is connected to the rodless chamber of the actuator cylinder; the control oil port of the hydraulically controlled one-way valve is connected to the outlet of the two-position two-way valve, and when there is no pressure oil signal at the control oil port of the hydraulically controlled one-way valve, the hydraulically controlled one-way valve can only conduct one-way flow; when there is a pressure oil signal at the control oil port of the hydraulically controlled one-way valve, the hydraulically controlled one-way valve can conduct two-way flow;

[0017] The outlet end of the cartridge valve is divided into four branches, the main branch is connected to the accumulator, the second branch is connected to the rear end of the cartridge valve, the third branch is connected to the rod chamber of the actuator cylinder, and the fourth branch is connected to the inlet of the two-position two-way valve.

[0018] Optionally, the hydraulic actuator further includes a rack and a gear, wherein the rack is connected to the actuator cylinder piston rod, the gear and the rack are meshed, and the gear is connected to the handle of the control ball valve through a shaft to drive the control ball valve to open and close.

[0019] Optionally, when the actuator cylinder piston rod moves to the right, it pushes the rack to move to the right, and the gear meshing with it rotates counterclockwise. When the actuator cylinder moves to the left, it pulls the rack to move left synchronously, and the gear meshing with it rotates clockwise. During the rotation process, the gear drives the control ball valve handle to rotate to drive the control ball valve to open and close.

[0020] Optionally, the pressure oil tank is provided with an oil return port, and the oil return port is connected to an outlet of the hydraulic motor.

[0021] Optionally, the air pressure above the pressure tank liquid level is between 0.3-0.5MPa

[0022] Optionally, the outlet of the accumulator is connected to a control valve group and a hydraulic motor. When the accumulator pressure reaches a set value, the control valve group is automatically opened / closed to drive the hydraulic motor to rotate, thereby driving the generator to generate electricity. During the rotation of the motor, the hydraulic oil returns to the pressure tank through the motor outlet.

[0023] Optionally, the oil suction pipe is an oil suction rubber hose, and the oil discharge pipe is an oil discharge rubber hose.

[0024] Optionally, in normal working state, the working hydraulic cylinder performs reciprocating motion under wave drive, and when the piston rod of the working hydraulic cylinder moves upward, the hydraulic oil in the rod chamber of the hydraulic cylinder is compressed into high pressure and enters the inlet end of the cartridge valve through the hydraulically controlled one-way valve and the oil drain pipe, and the oil drain pipe has another branch leading to the connection port of the rodless chamber of the actuator cylinder; after the high-pressure hydraulic oil enters the cartridge valve, it flows out through the outlet end of the cartridge valve in four branches, wherein the main branch enters the accumulator for energy storage and pressure stabilization, the second branch enters the rear end of the cartridge valve, so that the oil circuit of the cartridge valve will not flow back from the outlet end to the inlet end, the third branch is connected to the connection port of the rod chamber of the actuator cylinder, the piston rod of the actuator cylinder is in a fully extended state, the control ball valve is in an open state, the fourth branch leads to the inlet of the two-position two-way valve, the inlet and outlet of the two-position two-way valve are not connected, the control oil port of the hydraulically controlled one-way valve has no pressure signal input, and the hydraulically controlled one-way valve can only be conducted from left to right;

[0025] When the working hydraulic cylinder moves downward, the rod chamber of the working hydraulic cylinder will absorb oil from the pressure oil tank through the common one-way valve, the oil suction hose and the control ball valve;

[0026] Driven continuously by the waves, the working hydraulic cylinder continuously performs normal oil suction and oil discharge actions.

[0027] Optionally, when the oil drain pipe ruptures, the piston rod of the hydraulic actuator cylinder will move to the left and be in a contracted state. During the contraction process, the rack will drive the gear to rotate, thereby pushing the control ball valve handle to rotate, so that the control ball valve is closed, cutting off the oil source of the working hydraulic cylinder.

[0028] Optionally, when the oil suction hose ruptures, the piston rod of the hydraulic actuator cylinder will move to the left and be in a retracted state. During the retraction process, the rack will drive the gear to rotate, thereby pushing the control ball valve handle to rotate, so that the control ball valve is closed, cutting off the oil source of the working hydraulic cylinder.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The wave energy hydraulic energy conversion system provided in this embodiment has the function of preventing continuous leakage of oil. Compared with the traditional wave energy hydraulic energy conversion system, it has the function of quickly cutting off the oil suction line when the oil suction hose and the oil discharge hose are broken, so that the hydraulic oil of the system will not continue to leak, causing environmental pollution problems and economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage provided in the embodiment of the present application

[0032] Figure 2 Schematic diagram of hydraulic actuator composition

[0033] Figure 3 The oil discharge hose rupture system status diagram

[0034] Figure 4 The oil suction hose rupture system status diagram

[0035] Figure 5 This is the state diagram of the hydraulic actuator when the control ball valve is opened

[0036] Figure 6 The hydraulic actuator status diagram when the control ball valve is closed

[0037] Explanation of the reference numerals: 1-working cylinder; 2-ordinary one-way valve; 3-oil suction hose; 4-two-position two-way valve; 5-control ball valve; 6-hydraulic actuator; 7-pressure oil tank; 8-hydraulic one-way valve; 9-oil discharge hose; 10-cartridge valve; 11-accumulator; 6.1-actuator cylinder barrel; 6.2-actuator cylinder piston rod; 6.3-gear; 6.4-rack. DETAILED DESCRIPTION

[0038] Example:

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 a limitation on the present application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, if the terms "install", "connect", "connect", "fix" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the above terms can be understood in their specific meanings in this application according to the specific circumstances.

[0043] In this application, unless otherwise clearly specified and limited, if there is a description such as "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, "above", "above" and "above" a first feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "below" a first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0045] See also Figure 1 and Figure 2 As shown, the wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage provided in this embodiment mainly includes a working cylinder 1, a common check valve 2, an oil suction hose 3, a two-position two-way valve 4, a control ball valve 5, a hydraulic actuator 6, a pressure oil tank 7, a hydraulic control check valve 8, an oil discharge hose 9, a cartridge valve 10 and an accumulator 11. The common check valve 2 is a conventional check valve that can only conduct in one direction.

[0046] The two-position two-way valve includes three ports, namely the pilot oil port G, the inlet port A and the outlet port B; the cartridge valve includes three ports, distributed as the inlet port C, the outlet port D and the rear end H.

[0047] The hydraulic actuator 6 comprises an actuator cylinder barrel 6.1 and an actuator cylinder piston rod 6.2. The actuator cylinder piston rod 6.2 is installed in the actuator cylinder barrel 6.1 to divide the actuator cylinder barrel 6.1 into an actuator cylinder rodless chamber and an actuator cylinder rod chamber.

[0048] The working hydraulic cylinder 1 includes a cylinder barrel and a piston rod installed in the cylinder barrel. The area where the piston rod is located in the cylinder barrel is a rod chamber; the piston rod is used to connect to the wave-absorbing float, and the cylinder barrel end is used to connect to the base; the rod chamber is respectively connected to one end of the ordinary one-way valve 2 and the hydraulic one-way valve 8. When the piston rod of the working hydraulic cylinder 1 moves upward, the hydraulic oil of the working hydraulic cylinder 1 is discharged from the hydraulic one-way valve 8. When the working hydraulic cylinder 1 moves downward, the rod chamber of the working hydraulic cylinder 1 absorbs oil through the ordinary one-way valve 2.

[0049] The other end of the ordinary one-way valve 2 is connected to one end of the oil suction pipe 3, and the other end of the oil suction pipe 3 is divided into two paths, one path is connected to one end of the control ball valve 5, and the other path is connected to the pilot oil port G of the two-position two-way valve 4; the other end of the control ball valve 5 is connected to the oil suction port of the pressure oil tank 7; the control ball valve 5 is driven to open and close by the hydraulic actuator 6.

[0050] The other end of the hydraulically controlled one-way valve 8 is connected to one end of the oil drain pipe 9, and the other end of the oil drain pipe 9 is divided into two paths, one of which is connected to the inlet end C of the cartridge valve 10, and the other is connected to the connection port E of the rodless chamber of the actuator cylinder; the control oil port of the hydraulically controlled one-way valve 8 is connected to the outlet B of the two-position two-way valve. When there is no pressure oil signal at the control oil port of the hydraulically controlled one-way valve 8, the hydraulically controlled one-way valve 8 can only conduct one-way, from the left to the right, but not from the right to the left; when there is a pressure oil signal at the control oil port of the hydraulically controlled one-way valve 8, the hydraulically controlled one-way valve can conduct two-way.

[0051] The outlet end D of the cartridge valve 10 is divided into four branches. The main branch is connected to the accumulator 11 to perform the energy storage and pressure stabilization process. The second branch is connected to the rear end H of the cartridge valve 10. The third branch is connected to the connection port F of the rod chamber of the actuator cylinder. The fourth branch is connected to the inlet A of the two-position two-way valve 4.

[0052] In a specific embodiment, the hydraulic actuator 6 also includes a gear 6.3 and a rack 6.4. The rack 6.4 is connected to the end of the actuator cylinder piston rod 6.2. The gear 6.3 and the rack 6.4 are meshed. The gear 6.3 is connected to the handle of the control ball valve 5 through an axis to drive the operation of the control ball valve 5. When the actuator cylinder piston rod 6.2 moves to the right, the rack 6.4 is pushed to move to the right, and the gear 6.3 meshed therewith rotates counterclockwise. When the actuator cylinder piston rod 6.2 moves to the left, the rack 6.4 is pulled to move to the left synchronously, and the gear 6.3 meshed therewith rotates clockwise. During the rotation, the gear 6.3 drives the handle of the control ball valve 5 to rotate, so as to drive the control ball valve 5 to open and close. In this way, the opening and closing of the control ball valve 5 can be driven and controlled by the hydraulic actuator 6.

[0053] In a specific embodiment, the pressure oil tank 7 is also provided with an oil return port, which is connected to the outlet of the hydraulic motor. The air pressure above the pressure oil tank liquid level is between 0.3-0.5MPa.

[0054] In a specific embodiment, the outlet of the accumulator 11 is connected to the control valve group and the hydraulic motor. When the pressure of the accumulator 11 reaches the set value, the control valve group is automatically opened / closed to drive the hydraulic motor to rotate and drive the generator to generate electricity. During the rotation of the motor, the hydraulic oil returns to the pressure oil tank 7 through the motor outlet.

[0055] See also Figure 1 As shown, when the system is in normal working state, the working hydraulic cylinder 1 performs reciprocating motion under the wave drive. When the piston rod of the working hydraulic cylinder 1 moves upward, the hydraulic oil in the rod chamber of the hydraulic cylinder is compressed into high pressure and enters the inlet end C of the cartridge valve through the hydraulic control one-way valve 2 and the oil discharge hose 9. The oil discharge hose 9 also has another branch leading to the connection port E of the rodless chamber of the actuator cylinder, thereby entering the rodless chamber of the hydraulic actuator cylinder; after the high-pressure hydraulic oil enters the cartridge valve 10, it is divided into four branches through the outlet end D of the cartridge valve 10 Outflow, where the main branch enters the accumulator 11 for energy storage and pressure stabilization, the second branch enters the rear end H of the cartridge valve 10, so that the oil circuit of the cartridge valve will not flow back from the outlet end D to the inlet end C, and the third branch is connected to the connection port F of the rod chamber of the actuator cylinder. Since the pressure oil of the rodless chamber and the rod chamber of the actuator cylinder are both from the right end of the working hydraulic cylinder 1, the pressure is basically the same, but since the cross-sectional area of ​​the rodless chamber of the actuator cylinder is larger than that of the rod chamber, the piston rod 6.2 of the actuator cylinder is in a fully extended state, such as Figure 5As shown, at this time, the control ball valve 5 is in the open state; the fourth branch leads to the inlet A of the two-position two-way valve. At this time, the two-position two-way valve is in the left position because the pilot oil port G leads to the pressure oil tank 7 through the control ball valve 5. The pressure oil tank has a pressure of 0.3-0.5MPa, so there is a pressure oil signal input, the valve core remains in the left position, the inlet A and the outlet B are not connected, so there is no pressure signal input to the control oil port of the hydraulic control check valve 8, and the hydraulic control check valve 8 can only be conducted from left to right. When the working hydraulic cylinder 1 moves downward, the rod chamber of the working hydraulic cylinder 1 will absorb oil from the pressure oil tank 7 through the ordinary check valve 2 and the oil suction hose 3 and the control ball valve 5. Driven by the wave wave continuously, the working hydraulic cylinder 1 continuously performs normal oil suction and oil discharge actions.

[0056] When the oil drain hose 9 is broken, Figure 3 As shown, the right end of the hydraulically controlled one-way valve 8 is in an open state, and the pressure cannot be established, so the pressure in the rodless chamber of the actuator cylinder disappears. However, since the inlet end C and the outlet end D of the cartridge valve 10 are also one-way, the pressure of the original high-pressure pipeline behind the outlet end D of the cartridge valve 10 cannot be transmitted to the inlet end C through the outlet end D. Therefore, the pipeline pressure behind the outlet end D of the cartridge valve 10 always exists, and the pressure of the third branch at the outlet D end connected to the connecting port F of the rod chamber of the actuator cylinder is maintained. Since the rod chamber of the actuator cylinder is high pressure and the rodless chamber is low pressure, the piston rod of the hydraulic actuator cylinder will move to the left and be in a contracted state, as shown in FIG. Figure 6 As shown, during the contraction process, the rack 6.4 drives the gear 6.3 to rotate, thereby pushing the handle of the control ball valve 5 to rotate, so that the control ball valve 5 is closed, cutting off the oil circuit source of the working hydraulic cylinder, so that the hydraulic oil will not be continuously sucked from the pressure oil tank 7 through the working oil cylinder, and then flow out from the damaged oil discharge hose 9, thereby avoiding continuous leakage of the hydraulic oil from the oil discharge pipe.

[0057] When the oil suction hose 3 is broken, Figure 4As shown, the left end of the ordinary one-way valve 2 is in an open state, and the pressure cannot be established. Therefore, the pressure signal from the pressure oil tank 7 cannot be transmitted to the pilot oil port G of the two-position two-way valve 4. Under the action of the spring, the two-position two-way valve 4 moves the valve core to the right, and the inlet A and outlet B of the two-position two-way valve 4 are connected. The pipeline pressure behind the outlet end D of the cartridge valve 10 always exists, and the fourth branch pressure oil behind the outlet end D will enter the control oil port of the hydraulic control one-way valve 8 through the two-position two-way valve 4. After the control oil port has a pressure oil signal, the hydraulic control one-way valve 8 is bidirectionally connected. The section of the pipeline from the right end of the hydraulic control one-way valve 8 to the inlet end C of the cartridge valve 10 has the same pressure as the rod chamber pressure of the working hydraulic cylinder. Due to the rupture of the oil suction hose 3, there is no continuous hydraulic oil input to the rod chamber of the working hydraulic cylinder 1, resulting in the working hydraulic The cylinder is in a no-load state, and the rod chamber of the working hydraulic cylinder 1 will be in an oil-free, no-load, low-pressure state. Therefore, the section of the pipeline from the right end of the hydraulic control one-way valve 8 to the inlet end C of the cartridge valve 10 is also in a low-pressure state, and the rodless chamber of the actuator cylinder connected to this section of the pipeline will also be in a low-pressure state. However, since the inlet end C and the outlet end D of the cartridge valve 10 are also unidirectional, the pressure of the original high-pressure pipeline behind the outlet end D of the cartridge valve cannot be transmitted to the inlet end C through the outlet end D. Therefore, the pipeline pressure behind the outlet end D of the cartridge valve always exists, and the pressure of the third branch of the outlet end D connected to the connection port F of the rod chamber of the actuator cylinder is maintained. Since the rod chamber is high pressure and the rodless chamber is low pressure, the piston rod of the hydraulic actuator cylinder will move to the left and be in a contracted state, such as Figure 6 As shown, during the contraction process, the rack 6.4 drives the gear 6.3 to rotate, thereby pushing the handle of the control ball valve 5 to rotate, so that the control ball valve 5 is closed, cutting off the oil circuit source of the working hydraulic cylinder, so that the hydraulic oil will not continue to flow out of the damaged oil suction pipeline.

[0058] In summary, the wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage provided in this embodiment, compared with the traditional wave energy hydraulic energy conversion system, has the feature that when the oil suction hose and the oil discharge hose are broken, the oil suction pipeline can be quickly cut off, so that the hydraulic oil of the system will not continue to leak, causing environmental pollution problems and economic losses.

[0059] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage, characterized in that: It includes working cylinder, ordinary one-way valve, oil suction pipe, pressure oil tank, two-position two-way valve, hydraulic one-way valve, oil discharge pipe, cartridge valve and accumulator; The two-position two-way valve includes three ports, namely a pilot oil port, an inlet port and an outlet port; The cartridge valve includes three ports, distributed as an inlet end, an outlet end and a rear end; The pressure oil tank is provided with an oil suction port; The hydraulic actuator comprises an actuator cylinder barrel and an actuator cylinder piston rod, wherein the actuator cylinder piston rod is installed in the actuator cylinder barrel to divide the actuator cylinder barrel into an actuator cylinder rodless chamber and an actuator cylinder rod chamber; The working cylinder comprises a cylinder barrel and a piston rod installed in the cylinder barrel, and the area where the piston rod is located in the cylinder barrel is a rod chamber; the rod chamber is respectively connected to one end of the common one-way valve and the hydraulic one-way valve; The other end of the ordinary one-way valve is connected to one end of the oil suction pipe, and the other end of the oil suction pipe is divided into two paths, one path is connected to one end of the control ball valve, and the other path is connected to the pilot oil port of the two-position two-way valve; The other end of the control ball valve is connected to the oil suction port of the pressure oil tank; the control ball valve is driven to open and close by the hydraulic actuator; The other end of the hydraulically controlled one-way valve is connected to one end of the oil drain pipe, and the other end of the oil drain pipe is divided into two paths, one of which is connected to the inlet end of the cartridge valve, and the other is connected to the rodless chamber of the actuator cylinder; the control oil port of the hydraulically controlled one-way valve is connected to the outlet of the two-position two-way valve, and when there is no pressure oil signal at the control oil port of the hydraulically controlled one-way valve, the hydraulically controlled one-way valve can only conduct one-way flow; when there is a pressure oil signal at the control oil port of the hydraulically controlled one-way valve, the hydraulically controlled one-way valve can conduct two-way flow; The outlet end of the cartridge valve is divided into four branches, the main branch is connected to the accumulator, the second branch is connected to the rear end of the cartridge valve, the third branch is connected to the rod chamber of the actuator cylinder, and the fourth branch is connected to the inlet of the two-position two-way valve.

2. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 1 is characterized in that: The hydraulic actuator also includes a rack and a gear, the rack is connected to the actuator cylinder piston rod, the gear and the rack are meshed, and the gear is connected to the handle of the control ball valve through a shaft to drive the control ball valve to open and close.

3. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 2 is characterized in that: When the piston rod of the actuator cylinder moves to the right, it pushes the rack to move to the right, and the gear meshing with it rotates counterclockwise. When the actuator cylinder moves to the left, it pulls the rack to move to the left synchronously, and the gear meshing with it rotates clockwise. During the rotation process, the gear drives the control ball valve handle to rotate to drive the control ball valve to open and close.

4. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 1 is characterized in that: The pressure oil tank is provided with an oil return port, and the oil return port is connected to the outlet of the hydraulic motor.

5. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 4 is characterized in that: The air pressure above the liquid level of the pressure oil tank is between 0.3-0.5 MPa.

6. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 1, characterized in that: The outlet of the accumulator is connected to the control valve group and the hydraulic motor. When the accumulator pressure reaches the set value, the control valve group is automatically opened / closed to drive the hydraulic motor to rotate and drive the generator to generate electricity. During the rotation of the motor, the hydraulic oil returns to the pressure oil tank through the motor outlet.

7. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 1, characterized in that: The oil suction pipe is an oil suction rubber hose, and the oil discharge pipe is an oil discharge rubber hose.

8. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 4, characterized in that: In normal working state, the working hydraulic cylinder performs reciprocating motion under the wave drive. When the piston rod of the working hydraulic cylinder moves upward, the hydraulic oil in the rod chamber of the hydraulic cylinder is compressed into high pressure and enters the inlet end of the cartridge valve through the hydraulic control one-way valve and the oil discharge pipe. The oil discharge pipe also has another branch leading to the connection port of the rodless chamber of the actuator cylinder; after the high-pressure hydraulic oil enters the cartridge valve, it flows out in four branches through the outlet end of the cartridge valve, wherein the main branch enters the accumulator for energy storage and pressure stabilization, the second branch enters the rear end of the cartridge valve, so that the oil circuit of the cartridge valve will not flow back from the outlet end to the inlet end, the third branch is connected to the connection port of the rod chamber of the actuator cylinder, the piston rod of the actuator cylinder is in a fully extended state, the control ball valve is in an open state, the fourth branch leads to the inlet of the two-position two-way valve, the inlet and outlet of the two-position two-way valve are not connected, the control oil port of the hydraulic control one-way valve has no pressure signal input, and the hydraulic control one-way valve can only be conducted from left to right; When the working hydraulic cylinder moves downward, the rod chamber of the working hydraulic cylinder will absorb oil from the pressure oil tank through the common one-way valve, the oil suction hose and the control ball valve; Driven continuously by the waves, the working hydraulic cylinder continuously performs normal oil suction and oil discharge actions.

9. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 4, characterized in that: When the oil drain pipe ruptures, the piston rod of the hydraulic actuator cylinder will move to the left and be in a retracted state. During the retraction process, the rack will drive the gear to rotate, thereby pushing the control ball valve handle to rotate, causing the control ball valve to close and cutting off the oil circuit source of the working hydraulic cylinder.

10. The wave energy hydraulic energy conversion system with the function of preventing continuous oil leakage as claimed in claim 4, characterized in that: When the oil suction hose ruptures, the piston rod of the hydraulic actuator cylinder will move to the left and be in a retracted state. During the retraction process, the rack will drive the gear to rotate, thereby pushing the control ball valve handle to rotate, causing the control ball valve to close and cutting off the oil circuit source of the working hydraulic cylinder.

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