Low-power-consumption self-locking electromagnetic valve for ocean temperature difference energy power generation and working method

Abstract

The invention relates to a low-power-consumption self-locking type electromagnetic valve for ocean temperature difference energy power generation and a working method, and belongs to the field of deep sea energy equipment. The low-power-consumption self-locking type electromagnetic valve comprises a valve body, a valve element, a valve sleeve, a limiting assembly and an electromagnet assembly, the electromagnet assembly comprises an electromagnet shell, an armature, a coil and a self-locking assembly, and the valve body is fixedly connected to the electromagnet shell; the valve sleeve is located in the valve body, the valve element is arranged in a through hole A in the middle of the valve sleeve and can axially move in the through hole A, and one end of the valve element is connected with the end of the valve body through a limiting assembly. A transmission screw penetrates through the through hole B of the electromagnet shell, the other end of the valve element is fixedly connected with one end of the transmission screw, the other end of the transmission screw is connected with a self-locking assembly, and a main spring is arranged between the self-locking assembly on the transmission screw and the electromagnet shell. By adding the self-locking structure, the electromagnetic valve can be switched between the long closing state and the long opening state, the structure is simple, machining is easy, cost is low, system electric energy consumption is reduced, and low-power-consumption work is achieved.

Description

Technical Field

[0001] The invention relates to a low-power self-locking electromagnetic valve for ocean temperature difference energy power generation and a working method, belonging to the technical field of deep-sea energy equipment. Background Art

[0002] With the rapid growth of the world economy, energy supply is becoming increasingly tight, and mankind has entered a new stage of developing marine resources, especially deep-sea resources. Ocean temperature difference power generation is a renewable energy technology that uses the temperature difference between the ocean surface water and deep sea water to generate electricity, and has great development potential. In the ocean temperature difference power generation system, the solenoid valve can control the flow and pressure of the system and change the motion state of the device, and is an indispensable component. For the normally closed solenoid valve, if the valve port is kept in the conducting state for a period of time, it needs to be continuously energized, which increases the power consumption of the power generation system and reduces the power generation efficiency. Therefore, it is of great significance to develop a low-power self-locking solenoid valve.

[0003] In the prior art, most self-locking solenoid valves adopt the method of adding permanent magnets, whose magnetic force is easily disturbed by temperature and external magnetic fields, difficult to install and adjust, and high cost. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a low-power self-locking solenoid valve and working method for ocean temperature difference energy power generation. By adding a self-locking structure, the solenoid valve can be switched between long-closed and long-open states. The structure is simple, easy to process, and has low cost, which reduces the system's power consumption and achieves low-power operation.

[0005] The present invention adopts the following technical solutions: On the one hand, the present invention provides a low-power self-locking solenoid valve for ocean temperature difference energy power generation, comprising a valve body, a valve core, a valve sleeve, a limit assembly and an electromagnet assembly, wherein the electromagnet assembly comprises an electromagnet housing, an armature, a coil and a self-locking assembly, wherein the armature is arranged in an axial slide groove inside the electromagnet housing and can move along the axial slide groove, and the coil is wound around the armature to control the movement of the armature; The valve body is fixedly connected to the electromagnet housing, the valve sleeve is located inside the valve body, a gasket is provided between the valve sleeve and the electromagnet housing for sealing, an oil inlet channel is provided on the valve sleeve, a through hole A is provided in the middle of the valve sleeve, the valve core is provided in the through hole A and can move axially in the through hole A, one end of the valve core is connected to the end of the valve body through a limit assembly, and an oil return channel is formed after the valve sleeve is separated from the valve core; A through hole B is provided inside the electromagnet housing, and a transmission screw is passed through the through hole B. The transmission screw transmits force to the valve core through the through hole B. The other end of the valve core is fixedly connected to one end of the transmission screw, and the other end of the transmission screw is connected to the self-locking component. A main spring is provided between the self-locking component on the transmission screw and the electromagnet housing.

[0006] The solenoid housing is fixed by fixing bolts.

[0007] Preferably, a stepped shaft is provided at one end of the valve core, with large ends at both ends and a small end in the middle, and the large end and the small end are connected in the middle by a tapered shaft.

[0008] Preferably, the limit assembly includes a limit shaft and a limit spring, the limit spring is arranged on the limit shaft, one end of the limit shaft is fixedly connected to one end of the valve core with a stepped shaft, one end of the limit spring is sleeved on the stepped shaft of the valve core, the other end of the limit spring is a free end, and is connected to the inner wall of the valve body, fixing the valve core so that it always moves along the horizontal axis. When the limit assembly is pressed, it is connected to the inner wall of the valve body, one end of the limit spring is connected to the stepped shaft of the valve core, and the other end is connected to the inner wall of the valve body, and the valve core is fixed so that it always moves along the horizontal axis.

[0009] Preferably, the valve sleeve is provided with an O-ring A and an O-ring D to prevent fluid leakage; An O-ring B is provided on the large end of the valve core that is connected to the through hole A of the valve sleeve, which contacts the inner wall of the valve sleeve for sealing, and lubricant is added to enable the valve core to move smoothly in the axial direction in the valve sleeve; An O-ring C is provided between the through hole B and the transmission screw to prevent fluid leakage and ensure axial movement of the transmission screw.

[0010] Preferably, the valve body is made of stainless steel; the self-locking component is made of aluminum alloy or stainless steel, which has excellent corrosion resistance and wear resistance. The surface of the self-locking component is coated with polytetrafluoroethylene material to reduce friction of the contact surface.

[0011] Preferably, the self-locking component includes a rotating gear shaft, a sliding gear shaft and an embedded gear cylinder. The embedded gear cylinder is located at the outermost part and is fixedly connected to the electromagnet housing. The embedded gear cylinder is preferably inserted in the middle of the electromagnet housing hole and is interference fit to ensure that the two are tightly connected. One end of the sliding gear shaft is connected to the armature and can move axially in the embedded gear cylinder under the action of the armature.

[0012] The embedded gear cylinder is a cylindrical structure, and a plurality of slide grooves are arranged on the inner surface. The slide grooves are concave rectangular and pass through the embedded gear cylinder. The shape of the raised slider just fits the concave shape of the slide groove and can be stuck inside it for sliding. The sliding gear shaft is also a cylindrical structure, one end of which is closed, and the other end is provided with eight teeth of equal size and evenly distributed, and tooth grooves are formed between adjacent teeth. The sliding gear shaft is provided with a plurality of axial raised sliders, which cooperate with the sliding grooves on the inner surface of the embedded gear cylinder; The rotating gear shaft is sleeved inside the sliding gear shaft, and the outer surface of the rotating gear shaft is provided with a plurality of long teeth of equal axial distribution, the thickness of the long teeth is greater than the thickness of the teeth on the sliding gear shaft, and the tooth tip angle of the teeth of the sliding gear shaft is twice the tooth tip angle of the long teeth; one end of the transmission screw is connected to the rotating gear shaft, and the middle is connected to the valve core through the electromagnet housing, and relying on the force of the limit spring and the main spring, there is pressure between the two ends of the transmission screw and the rotating gear shaft and the valve core, and they are all tightly connected; the rotating gear shaft makes axial movement, driving the transmission screw to move, thereby pushing the valve core to open the return oil channel and the valve path is conductive; The end of the embedded gear cylinder is provided with a self-locking tooth groove and a restoring tooth groove, and the self-locking tooth groove and the restoring tooth groove are cross-distributed (i.e., the arrangement of self-locking tooth groove-restoring tooth groove-self-locking tooth groove-restoring tooth groove), and the length of the restoring tooth groove is greater than the length of the self-locking tooth groove; the tooth groove angles of the self-locking tooth groove and the restoring tooth groove are equal to the tooth tip angle of the long tooth on the rotating gear shaft.

[0013] A coil is wound around the armature to drive and control its movement. When the coil is energized, the armature moves toward the self-locking component, pushing the sliding gear shaft to slide. Through the meshing action of the teeth in the sliding gear shaft's tooth grooves and the long teeth in the rotating gear shaft, the rotating gear shaft is driven to perform both rotational and axial motions.

[0014] The self-locking component of the present invention can be used in conjunction with a solenoid valve to achieve its self-locking function. The self-locking module has a simple structure and is easy to process.

[0015] Preferably, a raised ring is provided at the end of the rotating gear shaft, and the bottom of the long teeth of the rotating gear shaft extends to the raised ring. The raised ring structure on the rotating gear shaft is connected to one end of the main spring, and the other end of the main spring contacts the inner wall of the electromagnet housing and is always in a compressed state. When the axial force exerted on the rotating gear shaft is greater than the spring force, the main spring is compressed, driving the transmission screw, thereby pushing the valve core to open the return oil channel and the valve path is connected; when the axial force exerted on the rotating gear shaft is less than the spring force, the main spring returns to its original state, the rotating gear shaft is reset under the action of the spring force, and the valve core is reset under the action of the spring force of the limit spring, thereby closing the return oil channel and disconnecting the valve path.

[0016] Preferably, the oil inlet channels are provided in plurality, and the plurality of oil inlet channels have the same structure, all use inclined through holes and are interconnected, and the plurality of oil inlet channels are evenly distributed around the valve sleeve. The use of inclined through holes can reduce the friction and impact of the fluid and improve the stability of the valve during movement.

[0017] The number of oil inlet channels is preferably four, and the number of oil inlets can be set according to actual needs.

[0018] On the other hand, the present invention provides a working method of the low-power self-locking solenoid valve for ocean temperature difference energy power generation based on the above-mentioned method, which controls the conduction and closure of each passage by controlling the working state of the solenoid valve to realize the power generation and discharge of the system and the movement state of the ocean temperature difference energy power generation buoy.

[0019] Under normal circumstances where there is no power, the raised slider of the sliding gear shaft in the self-locking component can only move axially in the sliding groove on the embedded gear cylinder. At this time, the tooth groove of the sliding gear shaft is not fully meshed with the long tooth tip of the rotating gear shaft; when the electromagnetic reversing valve plug is working and the coil is energized, the sliding gear shaft moves to the right under the action of the electromagnetic force. When the long tooth tip of the rotating gear shaft completely disengages from the tooth groove of the embedded gear cylinder, the long tooth tip of the rotating gear shaft lacks the rotation resistance force and moves along the tooth groove of the sliding gear shaft under the action of the spring force until the long tooth tip of the rotating gear shaft contacts the bottom of the tooth groove of the sliding gear shaft; The low-power self-locking solenoid valve is a long-closed type. The long teeth of the rotating gear shaft of the self-locking component are located in the recovery tooth groove of the embedded gear cylinder. When the valve of the oil return channel needs to be opened and becomes conductive, the coil needs to be energized, and the armature is subjected to a rightward electromagnetic force. When the electromagnetic force is greater than the spring force, the armature is driven to move rightward, and at the same time, the armature drives the sliding gear shaft to move axially. At this time, the raised slider of the sliding gear shaft moves axially in the sliding groove on the embedded gear cylinder, and the tooth groove of the sliding gear shaft is not fully engaged with the long tooth tip of the rotating gear shaft. With the axial movement of the sliding gear shaft, the long tooth tip of the rotating gear shaft completely disengages from the recovery tooth groove of the embedded gear cylinder, and the long tooth tip of the rotating gear shaft lacks the rotational resistance force. Under the action of the spring force, the rotating gear shaft moves leftward. Due to the cooperation of the long teeth and the teeth of the sliding gear shaft, the long teeth move axially to the left and rotate at the same time until they slide to the bottom of the tooth groove. At this time, the rotational movement and the axial movement to the left are restricted by the tooth groove; Subsequently, the rotating gear shaft continues to move to the right under the thrust of the sliding gear shaft, while driving the transmission screw to move to the right, and then pushing the valve core to the right, the return oil channel opens, and the limit spring is compressed. When the valve port of the return oil channel is opened to the maximum, the spring force and electromagnetic force acting on the armature are equal, the limit spring and the main spring both reach the maximum compression position, one end of the limit shaft is connected to the inner wall of the valve body, and the other end is connected to the valve core; at this time, the coil is powered off, the electromagnetic force disappears, and the self-locking assembly moves to the left under the action of the spring force, and the rotating gear shaft moves to the left to push the sliding gear shaft to move. At the beginning, the long teeth of the rotating gear shaft do not contact the self-locking tooth grooves of the embedded gear cylinder, and the long teeth only contact the tooth grooves of the sliding gear shaft. After continuous movement to the left, due to the long teeth The thickness of the teeth is greater than that of the sliding gear shaft, and the long teeth are connected to the tooth edges of the self-locking tooth grooves of the embedded gear cylinder. Because the rotating gear shaft will rotate along the self-locking tooth grooves of the embedded gear cylinder under the push of the spring force, and at the same time move axially until it slides to the bottom of the self-locking tooth groove (because the rotating gear shaft has no force to the left and is only subject to the spring force to the right, at this time the long teeth can only move along the self-locking tooth groove trajectory of the embedded gear cylinder, and will also push the sliding gear shaft to move to the left), at this time the rotating gear shaft will no longer move to the left, the transmission screw and the valve core are fixed, and the return oil channel is still in a conducting state, completing the self-locking of the solenoid valve. At this time, the long teeth of the rotating gear shaft in the self-locking assembly are in the self-locking tooth groove, realizing the transition from the normally closed state to the normally open state.

[0020] Preferably, when the valve of the oil return channel needs to be closed and changed to a closed state (from an open state to a closed state, that is, to allow the long teeth of the sliding gear shaft to move from the self-locking tooth groove of the embedded gear cylinder to the recovery tooth groove), the coil needs to be energized again, and when the electromagnetic force applied to the armature is greater than the spring force, the armature moves to the right, driving the sliding gear shaft to move to the right along the slide groove in the embedded gear cylinder. At this time, the tooth groove of the sliding gear shaft is not fully engaged with the long tooth tip of the rotating gear shaft. With the axial movement of the sliding gear shaft, the long tooth tip of the rotating gear shaft completely disengages from the self-locking tooth groove of the embedded gear cylinder. The long tooth tip of the rotating gear shaft lacks a rotational resistance force. Under the action of the spring force, the rotating gear shaft moves to the left. Due to the cooperation of the long teeth and the teeth of the sliding gear shaft, the long teeth move to the right. The gear shaft moves leftward axially and at the same time performs rotational movement until it slides to the bottom of the tooth groove of the tooth. At this time, the rotational movement and the axial movement to the left are restricted by the tooth groove; the coil is de-energized, the electromagnetic force disappears, and the self-locking component moves leftward under the action of the spring force (at this time, it is only affected by the spring force to the left). The rotating gear shaft pushes the sliding gear shaft to move leftward until the long teeth of the rotating gear shaft are connected with the tooth edges of the restoration tooth groove of the embedded gear cylinder. Then, under the push of the spring force, the rotating gear shaft rotates along the restoration tooth groove of the embedded gear cylinder and performs axial movement at the same time until it slides to the bottom of the adjacent restoration tooth groove. The rotating gear shaft, the transmission screw, and the valve core are fixed. At this time, the conical surface of the valve core is connected with the through hole edge of the valve sleeve, and the return oil channel is closed, realizing the transition from normally open to normally closed state.

[0021] The self-locking assembly of the present invention is easy to assemble, has a compact structure, does not have high-pressure leakage, and can ensure system stability.

[0022] Where the present invention is not exhaustive, prior art may be used.

[0023] The beneficial effects of the present invention are: 1. The present invention adopts the method of adding a self-locking component to the existing solenoid valve. For the normally closed solenoid valve, the oil return port can still remain in the open state after the coil is powered off. When the coil is powered on again, the oil return port becomes closed, thereby realizing the conversion between the normally open and normally closed states of the solenoid valve, and having self-locking properties. At the same time, when using the self-locking component, the coil does not need to be continuously energized when maintaining a certain state, thereby reducing the power consumption of the solenoid valve and improving the power generation efficiency of the ocean temperature difference energy power generation system.

[0024] 2. The raised slider of the present invention can cooperate with the sliding groove on the inner surface of the embedded gear cylinder, which can ensure that the sliding gear shaft slides axially along the embedded gear cylinder; in addition, the thickness of the long teeth in the present invention is greater than the thickness of the teeth on the sliding gear shaft, which can facilitate the long teeth to cooperate with the recovery tooth groove and the self-locking tooth groove on the embedded gear cylinder at the same time, and the tooth tip angle of the teeth of the sliding gear shaft is twice the tooth tip angle of the long teeth, so that the sliding gear shaft and the rotating gear shaft can be perfectly meshed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the low-power self-locking solenoid valve for ocean temperature difference energy power generation of the present invention; Figure 2 It is a schematic diagram of the structure of the self-locking component of the present invention; Figure 3 It is a schematic diagram of the sliding gear shaft structure of the self-locking assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the internal gear cylinder of the self-locking assembly of the present invention; Figure 5 It is a structural schematic diagram of the low-power self-locking solenoid valve of the present invention in a self-locking state; Figure 6 It is a schematic diagram of the state of the self-locking component of the present invention; Figure 7 This is a diagram showing the matching of the sliding gear shaft and the rotating gear shaft in the self-locking assembly of the present invention in a general state; Figure 8 It is a schematic diagram of the valve core structure; Fig. 9 It is the matching diagram of the sliding gear shaft and the rotating gear shaft in the self-locking assembly in the extreme position; In the figure, 1-valve body, 2-limit spring, 3-limit shaft, 4-valve core, 5-O-type sealing ring D, 6-first oil inlet channel, 7-valve sleeve, 8-O-type sealing ring A, 9-fixing bolt, 10-electromagnet housing, 11-armature, 12-coil, 13-electromagnetic reversing valve plug, 14-main spring, 15-O-type sealing ring B, 16-second oil inlet channel, 17-embedded gear cylinder, 18-rotating gear shaft, 19-sliding gear shaft, 20-return oil channel, 21-third oil inlet channel, 22-fourth oil inlet channel, 23-through hole B, 24-O-type sealing ring C, 25-transmission screw, 26-slide groove, 27-self-locking tooth groove, 28-restoring tooth groove, 29-raised slider, 30-raised ring, 31-oil inlet, 32-oil outlet, 33-tooth, 34-long tooth. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, they will be described in detail with reference to the accompanying drawings and specific embodiments, but are not limited to these. Anything not fully described in the present invention shall be based on conventional techniques in the art.

[0027] Example 1 A low-power self-locking solenoid valve for ocean temperature difference energy generation, such as Figures 1 to 9 As shown, it includes a valve body 1, a valve core 4, a valve sleeve 7, a limit assembly and an electromagnet assembly, the electromagnet assembly includes an electromagnet housing 10, an armature 11, a coil 12 and a self-locking assembly, the armature 11 is arranged in an axial slide groove inside the electromagnet housing 10 and can move along the axial slide groove, the coil 12 is wound around the armature 11, and is used to control the movement of the armature 11; The valve body 1 is fixedly connected to the electromagnet housing 10, the valve sleeve 7 is located inside the valve body 1, a gasket is provided between the valve sleeve 7 and the electromagnet housing 10 for sealing, an oil inlet channel is provided on the valve sleeve 7, a through hole A is provided in the middle of the valve sleeve 7, a valve core 4 is provided in the through hole A, and can move axially in the through hole A, one end of the valve core 4 is connected to the end of the valve body 1 through a limit assembly, and an oil return channel 20 is formed after the valve sleeve 7 is separated from the valve core 4; A through hole B 23 is provided inside the electromagnet housing 10, and a transmission screw 25 is inserted into the through hole B 23. The transmission screw 25 transmits force to the valve core 4 through the through hole B 23. The other end of the valve core 4 is fixedly connected to one end of the transmission screw 25, and the other end of the transmission screw 25 is connected to the self-locking component. A main spring 14 is provided between the self-locking component on the transmission screw 25 and the electromagnet housing 10.

[0028] The electromagnet housing 10 is fixed by fixing bolts 9 .

[0029] Example 2 A low-power self-locking solenoid valve for ocean temperature difference energy generation, as described in Example 1, except that Figure 8 As shown, a stepped shaft is provided at one end of the valve core 4, with large ends at both ends and a small end in the middle, and the large end and the small end are connected in the middle through a tapered shaft.

[0030] Example 3 A low-power self-locking solenoid valve for ocean temperature difference energy generation, as described in Example 2, the difference is that the limit assembly includes a limit shaft 3 and a limit spring 2, the limit spring 2 is arranged on the limit shaft 3, one end of the limit shaft 3 is fixedly connected to one end of the valve core 4 with a stepped shaft, one end of the limit spring 2 is sleeved on the stepped shaft of the valve core 4, the other end of the limit spring 2 is a free end, and is connected to the inner wall of the valve body 1, and the valve core 4 is fixed so that it always moves along the horizontal axis. When the limit assembly is pressed, it is connected to the inner wall of the valve body 1, one end of the limit spring 2 is connected to the stepped shaft of the valve core 4, and the other end is connected to the inner wall of the valve body 1, and the valve core 4 is fixed so that it always moves along the horizontal axis.

[0031] Example 4 A low-power self-locking solenoid valve for ocean temperature difference energy generation, as described in Example 3, except that an O-ring A 8 and an O-ring D 5 are provided on the valve sleeve 7 to prevent fluid leakage; An O-type sealing ring B 15 is provided on the large end of the valve core 4 that is connected to the through hole A of the valve sleeve 7, and contacts with the inner wall of the valve sleeve 7 for sealing, while adding lubricant to enable the valve core to perform smooth axial movement in the valve sleeve; An O-ring C 24 is provided between the through hole B 23 and the drive screw 25 to prevent fluid leakage and ensure axial movement of the drive screw.

[0032] Example 5 A low-power self-locking solenoid valve for ocean temperature difference energy generation is as described in Example 4, except that the valve body 1 is made of stainless steel; the self-locking component is made of aluminum alloy or stainless steel with excellent corrosion resistance and wear resistance, and the surface of the self-locking component is coated with polytetrafluoroethylene material to reduce the friction of the contact surface.

[0033] Example 6 A low-power self-locking solenoid valve for ocean temperature difference energy generation, as described in Example 5, except that Figure 2 As shown, the self-locking assembly includes a rotating gear shaft 18, a sliding gear shaft 19 and an embedded gear cylinder 17. The embedded gear cylinder 17 is located at the outermost part. The embedded gear cylinder 17 is fixedly connected to the electromagnet housing 10. The embedded gear cylinder 17 is preferably inserted in the middle of the electromagnet housing hole to perform interference fit to ensure that the two are tightly connected. One end of the sliding gear shaft 19 is connected to the armature 11, and can move axially in the embedded gear cylinder under the action of the armature 11.

[0034] The internal gear cylinder 17 is a cylindrical structure, and a plurality of slide grooves 26 are arranged on the inner surface. The slide grooves 26 are concave rectangular and pass through the internal gear cylinder 17. The shape of the protruding slider 29 just fits the concave shape of the slide groove 26 and can be stuck inside it for sliding. The sliding gear shaft 19 is also a cylindrical structure, one end of which is closed, and the other end is provided with eight teeth 33 of equal size and evenly distributed, and tooth grooves are formed between adjacent teeth 33. The sliding gear shaft 19 is provided with a plurality of axial raised sliders 29, and the raised sliders 29 cooperate with the slide grooves 26 on the inner surface of the embedded gear cylinder 17, so that the sliding gear shaft 19 can slide axially along the embedded gear cylinder 17; The rotating gear shaft 18 is sleeved inside the sliding gear shaft 19. The outer surface of the rotating gear shaft 18 is provided with a plurality of long teeth 34 of equal axial distribution. The thickness of the long teeth 34 is greater than the thickness of the teeth 33 on the sliding gear shaft, so that the long teeth 34 can cooperate with the recovery tooth grooves 28 and the self-locking tooth grooves 27 on the embedded gear cylinder 17 at the same time. The tooth tip angle of the teeth 33 of the sliding gear shaft 19 is twice the tooth tip angle of the long teeth 34, so that the sliding gear shaft 19 and the rotating gear shaft 18 can be perfectly meshed (for details of meshing, see Fig. 9 , the long tooth tip of the rotating gear shaft just touches the bottom of the tooth groove of the sliding gear shaft); the other end of the transmission screw 25 is connected to the rotating gear shaft 18, and the middle is connected to the valve core 4 through the electromagnet housing 10. Relying on the force of the limit spring 2 and the main spring 14, there is pressure between the two ends of the transmission screw 25 and the rotating gear shaft 18 and the valve core 4, and they are all tightly connected; the rotating gear shaft 18 makes axial movement, driving the transmission screw 25 to move, thereby pushing the valve core 4 to open the return oil channel and the valve path is conductive; A self-locking tooth groove 27 and a restoring tooth groove 28 are provided at the end of the embedded gear cylinder 17. The self-locking tooth groove 27 and the restoring tooth groove 28 are cross-distributed (i.e., the arrangement of self-locking tooth groove-restoring tooth groove-self-locking tooth groove-restoring tooth groove), and the length of the restoring tooth groove is greater than the length of the self-locking tooth groove; the tooth groove angles of the self-locking tooth groove 27 and the restoring tooth groove 28 are equal to the tooth tip angle of the long tooth 34 on the rotating gear shaft.

[0035] The inclination angles of the self-locking tooth groove and the restoring tooth groove are the same, such as Figure 4 , Figure 6 As shown in the figure, the structures of the self-locking tooth groove and the restoring tooth groove are not exactly the same, but their tooth edge inclination angles are the same. Compared with the self-locking tooth groove, the restoring tooth groove has an extra axial length, which can make the axial positions of the rotating gear shaft in the two tooth grooves different when the solenoid valve is powered off (when the long teeth of the rotating gear shaft are fully engaged with the restoring tooth groove, that is, the long teeth enter that part of the long shaft, at this time Figure 1 In the state, since the axial position of the rotating gear shaft is to the left, the valve core is closed under the action of the spring force, and this is the normally closed state; when the long teeth of the rotating gear shaft are fully engaged with the self-locking tooth groove, the state is as follows Figure 5, the axial position of the rotating gear shaft is to the right, so the valve core opens under the action of the rightward force of the rotating gear shaft and the transmission screw, and is in the normally open state at this time). The axial length of this part can ensure that when the solenoid valve is powered off, the axial positions of the rotating tooth grooves are different in the two states.

[0036] The armature 11 is surrounded by a coil 12 to drive and control its movement. When the coil 12 is energized, the armature 11 moves toward the self-locking component, pushing the sliding gear shaft 19 to slide. Through the meshing action of the teeth 33 of the sliding gear shaft 19 and the long teeth 34 of the rotating gear shaft 18, the rotating gear shaft 18 is driven to perform rotational motion and axial motion at the same time.

[0037] The self-locking component of the present invention can be used in conjunction with a solenoid valve to achieve its self-locking function. The self-locking module has a simple structure and is easy to process.

[0038] A raised ring 30 is provided at the end of the rotating gear shaft, and the bottom of the long teeth 34 of the rotating gear shaft 18 extends to the raised ring 30. The raised ring 30 structure on the rotating gear shaft 18 is connected to one end of the main spring 14, and the other end of the main spring 14 contacts the inner wall of the electromagnet housing 10 and is always in a compressed state. When the axial force exerted on the rotating gear shaft 18 is greater than the spring force, the main spring 14 is compressed, driving the transmission screw 25, thereby pushing the valve core 4 to open the return oil channel and the valve path is connected; when the axial force exerted on the rotating gear shaft 18 is less than the spring force, the main spring 14 returns to its original state, the rotating gear shaft 18 is reset under the action of the spring force, and the valve core is reset under the action of the spring force of the limit spring, so that the return oil channel is closed and the valve path is disconnected.

[0039] Example 7 A low-power self-locking solenoid valve for ocean temperature difference energy generation is as described in Example 6, except that a plurality of oil inlet channels are provided, and the plurality of oil inlet channels have the same structure and all use inclined through holes and are interconnected. The plurality of oil inlet channels are evenly distributed around the valve sleeve 7. The use of inclined through holes can reduce the friction and impact of the fluid and improve the stability of the valve during movement.

[0040] In this embodiment, there are four oil inlet channels, namely the first oil inlet channel 6, the second oil inlet channel 16, the third oil inlet channel 21 and the fourth oil inlet channel 22. The oil enters the valve sleeve through the four oil inlet channels to achieve communication. The oil return channel 20 is composed of the conical surface of the valve core 4 and the through hole of the valve sleeve 7. When the conical surface of the valve core 4 contacts the outer edge of the through hole of the valve sleeve 7, the oil return channel is closed. In this embodiment, the oil inlet and the oil outlet can be set according to actual needs. The oil inlet 31 is connected to the oil inlet channel, and the oil outlet 32 ​​is connected to the oil return channel.

[0041] Example 8 A working method of the low-power self-locking solenoid valve for ocean temperature difference energy power generation based on the above-mentioned method controls the conduction and closure of each passage by controlling the working state of the solenoid valve to realize the power generation and discharge of the system and the movement state of the ocean temperature difference energy power generation buoy.

[0042] Under normal circumstances where no power is supplied, the protruding slider 29 of the sliding gear shaft 19 in the self-locking assembly can only move axially in the slide groove 26 on the embedded gear cylinder 17. At this time, the tooth groove of the sliding gear shaft 19 is not fully meshed with the tooth tip of the long tooth 34 of the rotating gear shaft 18. When the electromagnetic reversing valve plug 13 is working and the coil 12 is energized, the sliding gear shaft 19 moves to the right under the action of the electromagnetic force. When the long tooth tip of the rotating gear shaft 18 is completely separated from the tooth groove of the embedded gear cylinder 17, the tooth tip of the long tooth 34 of the rotating gear shaft 18 lacks the rotation resistance force and moves along the tooth groove of the sliding gear shaft 19 under the action of the spring force until the tooth tip of the long tooth 34 of the rotating gear shaft 18 contacts the bottom of the tooth groove of the sliding gear shaft 19. The state is as follows: Fig. 9 As shown; The low-power self-locking solenoid valve is a long-closed type. The long teeth 34 of the rotating gear shaft 18 of the self-locking component are located in the recovery tooth groove 28 of the embedded gear cylinder 17. When the valve of the return oil channel 20 needs to be opened and becomes conductive, the coil 12 needs to be energized, and the armature 11 is subjected to an electromagnetic force to the right. When the electromagnetic force is greater than the spring force of the main spring 14 and the limit spring 2, the armature 11 is driven to move to the right. At the same time, the armature 11 drives the sliding gear shaft 19 to move axially. At this time, the protruding slider 29 of the sliding gear shaft 19 can only move axially in the slide groove 26 on the embedded gear cylinder 17, and the tooth groove of the sliding gear shaft 19 is not fully engaged with the long tooth tip of the rotating gear shaft 18. Figure 7 In the state shown, with the axial movement of the sliding gear shaft 19, the tooth tip of the long tooth 34 of the rotating gear shaft 18 completely disengages from the recovery tooth groove of the embedded gear cylinder 17, and the tooth tip of the long tooth of the rotating gear shaft 18 lacks the rotation resistance. Under the action of the spring force, the rotating gear shaft 18 will move to the left. Due to the cooperation between the long tooth and the teeth of the sliding gear shaft 19, the long tooth will perform rotational movement while moving axially to the left until it slides to the bottom of the tooth groove of the tooth 33. At this time, the rotational movement and the axial movement to the left are restricted by the tooth groove, as shown in FIG. Fig. 9 As shown; Then, the rotating gear shaft 18 continues to move rightward under the thrust of the sliding gear shaft 19, and at the same time drives the transmission screw 25 to move rightward, thereby pushing the valve core 4 to move rightward, the return oil channel 20 opens, and the limit spring 2 is compressed. When the valve port of the return oil channel 20 is opened to the maximum, the spring force and electromagnetic force on the armature 11 are equal, the limit spring 2 and the main spring 14 both reach the maximum compression position, one end of the limit shaft 3 is connected to the inner wall of the valve body 1, and the other end is connected to the valve core 4; at this time, the coil 1 2 When the power is turned off, the electromagnetic force disappears. Under the action of the spring force, the self-locking component moves to the left, and the rotating gear shaft 18 moves to the left to push the sliding gear shaft 19 to move. At the beginning, the long teeth of the rotating gear shaft 18 do not contact the self-locking tooth grooves 27 of the embedded gear cylinder, and the long teeth 34 only contact the tooth grooves of the sliding gear shaft 19. After continuing to move to the left, since the thickness of the long teeth 34 is greater than the thickness of the teeth 33 of the sliding gear shaft 19, the long teeth 34 will contact the tooth edges of the self-locking tooth grooves 27 of the embedded gear cylinder 17. Its state is as follows: Figure 2 As shown, the rotating gear shaft 18 will rotate along the self-locking tooth groove 27 of the embedded gear cylinder 17 under the push of the spring force, and at the same time move axially until it slides to the bottom end of the self-locking tooth groove 27 (because the rotating gear shaft has no left force and is only subject to the right spring force, at this time the long teeth can only move along the self-locking tooth groove trajectory of the embedded gear cylinder, and will also push the sliding gear shaft to move left), at this time the rotating gear shaft 18 will no longer move to the left, the transmission screw 25 and the valve core 4 are fixed, and the return oil channel 20 is still in a conducting state, completing the self-locking of the solenoid valve. At this time, the long teeth 34 of the rotating gear shaft 18 in the self-locking component are in the self-locking tooth groove 27, realizing the transition from the normally closed state to the normally open state, while reducing the power consumption of the solenoid valve in the system, achieving a low power consumption effect, as shown in FIG. Figure 5 As shown; the left and right directions of this embodiment 1 are Figure 1 left and right direction in center.

[0043] Example 9 A working method of a low-power self-locking solenoid valve for ocean temperature difference energy power generation, as described in Example 8, the difference is that when the valve of the return oil channel 20 needs to be closed and changed to a closed state (changing from an open state to a closed state, that is, allowing the long teeth of the sliding gear shaft to move from the self-locking tooth groove 27 of the embedded gear cylinder to the recovery tooth groove 28), the coil 12 needs to be energized again. When the electromagnetic force exerted on the armature 11 is greater than the spring force, the armature 11 moves to the right, driving the sliding gear shaft 19 to move to the right along the slide groove 26 in the embedded gear cylinder 17. At this time, the tooth groove of the sliding gear shaft 19 is not fully engaged with the tip of the long tooth 34 of the rotating gear shaft 18, such as Figure 7In the state shown, with the axial movement of the sliding gear shaft 19, the tooth tip of the long tooth 34 of the rotating gear shaft 18 is pushed to completely disengage from the self-locking tooth groove 27 of the embedded gear cylinder 17. At this time, the tooth tip of the long tooth 34 of the rotating gear shaft 18 lacks the rotation resistance. Under the action of the spring force, the rotating gear shaft 18 will move to the left. Due to the cooperation between the long tooth 34 and the teeth of the sliding gear shaft 19, the long tooth 34 will perform a rotational movement while moving axially to the left until it slides to the bottom of the tooth groove of the tooth 33. At this time, the rotational movement and the axial movement to the left are limited by the tooth groove. Its state is as shown in FIG. Fig. 9 As shown; at this time, the coil 12 is powered off, the electromagnetic force disappears, and the self-locking component moves to the left under the action of the spring force (at this time, it is only subject to the left spring force), and the rotating gear shaft 18 pushes the sliding gear shaft 19 to move until the long teeth of the rotating gear shaft 18 are in contact with the tooth edges of the restoration tooth grooves of the embedded gear cylinder 17, and then the rotating gear shaft 18, under the push of the spring force, will rotate along the restoration tooth grooves of the embedded gear cylinder 17, and at the same time move axially until it slides to the bottom end of the adjacent restoration tooth groove 28, and the rotating gear shaft 18, the transmission screw 25, and the valve core 4 are fixed in position. At this time, the conical surface of the valve core 4 is in contact with the edge of the through hole of the valve sleeve 7, and the return oil channel is closed, realizing the transition from the normally open state to the normally closed state. At this time, the structure is as shown Figure 1 shown.

[0044] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low-power self-locking solenoid valve for ocean temperature difference energy generation, characterized in that: It includes a valve body, a valve core, a valve sleeve, a limit assembly and an electromagnet assembly, wherein the electromagnet assembly includes an electromagnet housing, an armature, a coil and a self-locking assembly, wherein the armature is arranged in an axial slide groove inside the electromagnet housing and can move along the axial slide groove, and the coil is wound around the armature to control the movement of the armature; The valve body is fixedly connected to the electromagnet housing, the valve sleeve is located inside the valve body, an oil inlet channel is provided on the valve sleeve, a through hole A is provided in the middle of the valve sleeve, the valve core is arranged in the through hole A and can move axially in the through hole A, one end of the valve core is connected to the end of the valve body through a limit assembly, and an oil return channel is formed after the valve sleeve is separated from the valve core; A through hole B is provided inside the electromagnet housing, a transmission screw is passed through the through hole B, the other end of the valve core is fixedly connected to one end of the transmission screw, the other end of the transmission screw is connected to the self-locking component, and a main spring is provided between the self-locking component on the transmission screw and the electromagnet housing.

2. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 1 is characterized in that: One end of the valve core is provided with a stepped shaft, the two ends are large ends, the middle is a small end, and the middle of the large end and the small end are connected through a tapered shaft.

3. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 2 is characterized in that: The limit assembly includes a limit shaft and a limit spring, the limit spring is arranged on the limit shaft, one end of the limit shaft is fixedly connected to one end of the valve core with a stepped shaft, one end of the limit spring is sleeved on the stepped shaft of the valve core, and the other end of the limit spring is a free end and connected to the inner wall of the valve body.

4. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 3 is characterized in that: The valve sleeve is provided with an O-type sealing ring A and an O-type sealing ring D; An O-type sealing ring B is provided on the large end of the valve core that is connected to the through hole A of the valve sleeve; An O-type sealing ring C is arranged between the through hole B and the transmission screw.

5. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 4 is characterized in that: The valve body is made of stainless steel; the self-locking component is made of aluminum alloy or stainless steel, and the surface is coated with polytetrafluoroethylene material.

6. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 5 is characterized in that: The self-locking assembly includes a rotating gear shaft, a sliding gear shaft and an embedded gear cylinder, wherein the embedded gear cylinder is located at the outermost part and is fixedly connected to the electromagnet housing. The embedded gear cylinder is a cylindrical structure, and a plurality of sliding grooves are arranged on the inner surface; The sliding gear shaft is also a cylindrical structure, one end of which is closed, and the other end is provided with eight teeth of equal size and evenly distributed, and tooth grooves are formed between adjacent teeth. The sliding gear shaft is provided with a plurality of axial raised sliders, which cooperate with the sliding grooves on the inner surface of the embedded gear cylinder; The rotating gear shaft is sleeved inside the sliding gear shaft, and a plurality of long teeth with equal axial distribution are arranged on the outer surface of the rotating gear shaft, the thickness of the long teeth is greater than the thickness of the teeth on the sliding gear shaft, and the tooth tip angle of the teeth of the sliding gear shaft is twice the tooth tip angle of the long teeth; one end of the transmission screw is connected to the rotating gear shaft; The end of the embedded gear cylinder is provided with a self-locking tooth groove and a restoring tooth groove, which are cross-distributed, and the length of the restoring tooth groove is greater than the length of the self-locking tooth groove; the tooth groove angles of the self-locking tooth groove and the restoring tooth groove are equal to the tooth tip angle of the long tooth on the rotating gear shaft.

7. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 6 is characterized in that: The end of the rotating gear shaft is provided with a raised circular ring, the bottom of the long teeth of the rotating gear shaft extends to the raised circular ring, and the raised circular ring structure on the rotating gear shaft is connected to one end of the main spring.

8. The low-power self-locking solenoid valve for ocean temperature difference energy generation according to claim 7 is characterized in that: The oil inlet channels are provided in plurality, all of which are provided with inclined through holes and are interconnected, and the plurality of oil inlet channels are evenly distributed in the circumferential direction of the valve sleeve.

9. A method for operating a low-power self-locking solenoid valve for ocean temperature difference energy generation based on claim 8, characterized in that: The low-power self-locking solenoid valve is a long-closed type. The long teeth of the rotating gear shaft of the self-locking component are located in the recovery tooth groove of the embedded gear cylinder. When the valve of the oil return channel needs to be opened and becomes conductive, the coil needs to be energized, and the armature is subjected to a rightward electromagnetic force. When the electromagnetic force is greater than the spring force, the armature is driven to move rightward, and at the same time, the armature drives the sliding gear shaft to move axially. At this time, the raised slider of the sliding gear shaft moves axially in the sliding groove on the embedded gear cylinder, and the tooth groove of the sliding gear shaft is not fully engaged with the long tooth tip of the rotating gear shaft. With the axial movement of the sliding gear shaft, the long tooth tip of the rotating gear shaft completely disengages from the recovery tooth groove of the embedded gear cylinder, and the long tooth tip of the rotating gear shaft lacks the rotation resistance force. Under the action of the spring force, the rotating gear shaft moves leftward. Due to the cooperation of the long teeth and the teeth of the sliding gear shaft, the long teeth move axially to the left and rotate at the same time until they slide to the bottom of the tooth groove. At this time, the rotational movement and the axial movement to the left are restricted by the tooth groove; Subsequently, the rotating gear shaft continues to move to the right under the thrust of the sliding gear shaft, and at the same time drives the transmission screw to move to the right, thereby pushing the valve core to move to the right, the return oil channel opens, and the limit spring is compressed. When the valve port of the return oil channel is opened to the maximum, the spring force and electromagnetic force exerted on the armature are equal, the limit spring and the main spring both reach the maximum compression position, one end of the limit shaft is connected to the inner wall of the valve body, and the other end is connected to the valve core; at this time, the coil is powered off, the electromagnetic force disappears, and the self-locking component moves to the left under the action of the spring force, and the rotating gear shaft moves to the left to push the sliding gear shaft to move, and the long teeth of the rotating gear shaft at the beginning are engaged with the self-locking teeth of the embedded gear cylinder The groove does not contact, the long teeth only contact with the tooth groove of the sliding gear shaft. After continuously moving to the left, since the thickness of the long teeth is greater than the thickness of the teeth of the sliding gear shaft, the long teeth are connected with the tooth edges of the self-locking tooth groove of the embedded gear cylinder. Because the rotating gear shaft will rotate along the self-locking tooth groove of the embedded gear cylinder under the push of the spring force, and move axially at the same time, until it slides to the bottom of the self-locking tooth groove, the rotating gear shaft will no longer move to the left, the transmission screw and the valve core are fixed, and the return oil channel is still in the conducting state, completing the self-locking of the solenoid valve. At this time, the long teeth of the rotating gear shaft in the self-locking assembly are in the self-locking tooth groove, realizing the transition from the normally closed state to the normally open state.

10. The working method of the low-power self-locking solenoid valve for ocean temperature difference energy power generation according to claim 9, characterized in that: When the valve of the oil return channel needs to be closed and becomes closed, the coil needs to be energized again. When the electromagnetic force on the armature is greater than the spring force, the armature moves to the right, driving the sliding gear shaft to move to the right along the slide groove in the embedded gear cylinder. At this time, the tooth groove of the sliding gear shaft is not fully engaged with the long tooth tip of the rotating gear shaft. With the axial movement of the sliding gear shaft, the long tooth tip of the rotating gear shaft completely disengages from the self-locking tooth groove of the embedded gear cylinder. The long tooth tip of the rotating gear shaft lacks the rotation resistance force. Under the action of the spring force, the rotating gear shaft moves to the left. Due to the cooperation of the long teeth and the teeth of the sliding gear shaft, the long teeth perform a rotational motion while moving axially to the left. Until it slides to the bottom of the tooth groove, the rotational movement and the axial movement to the left are restricted by the tooth groove; the coil is de-energized, the electromagnetic force disappears, the self-locking assembly moves to the left under the action of the spring force, and the rotating gear shaft pushes the sliding gear shaft to move left until the long teeth of the rotating gear shaft are in contact with the tooth edges of the embedded gear cylinder recovery tooth groove, and then the rotating gear shaft rotates along the recovery tooth groove of the embedded gear cylinder under the push of the spring force, and moves axially at the same time until it slides to the bottom of the adjacent recovery tooth groove, the rotating gear shaft, the transmission screw, and the valve core are fixed in position, and the cone surface of the valve core is in contact with the through hole edge of the valve sleeve, the return oil channel is closed, and the normally open to normally closed state transition is achieved.

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