An underwater actuator

Abstract

The present invention discloses an underwater actuator, including an actuator body, a cover fixedly connected to the side wall of the actuator body by bolts, a mounting block fixedly connected to the inner side wall of the actuator body, a through cavity opened in the mounting block, a first tube fixedly connected to the mounting block and the cover, one end of the first tube extends through the through cavity, and the other end extends to the outside of the actuator body, an air bag is fixedly connected to one end of the first tube located outside the actuator body, a second tube is fixedly connected to the mounting block, one end of the second tube extends through the through cavity and the other end extends to the actuator body. The actuator provided by the present invention can effectively prevent the underwater pressure from damaging the shell, and at the same time can monitor the leakage in real time, discover and repair it in time, ensure the normal use of the actuator, and effectively prevent the actuator shell from being corroded.

Description

Technical Field

[0001] The present invention relates to the technical field of actuators, and in particular to an underwater actuator. Background Art

[0002] In the process of pipeline transportation, valves are one of the important components, which control the on-off and flow control of pipelines. Since pipelines for pipeline transportation are generally long, and in some special environments, such as underwater, it is difficult to manually control valves, therefore, actuators are often used to control pipeline transportation. Actuators are a combination of actuators and control valves in automatic control systems. Actuators receive control signals from controllers and change the size of the controlled medium, thereby maintaining the controlled variable at the required value or within a certain range. Actuators are divided into three categories according to the driving energy used: pneumatic, electric and hydraulic actuators. Actuators play an important role in the process of pipeline transportation, so their stable operation is the top priority of pipeline transportation.

[0003] In the prior art, existing actuators are subjected to greater pressure from the water when working underwater, especially in deep water. Although underwater actuators generally have strict sealing requirements, during long-term use, long-term application of pressure will still cause leakage, thereby affecting the operation of the actuator. At the same time, when used in some highly corrosive water, its casing will rust, affecting its normal operation. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose an underwater actuator.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An underwater actuator comprises an actuator body, a cover is fixedly connected to the side wall of the actuator body by bolts, a mounting block is fixedly connected to the inner wall of the actuator body, a through cavity is opened in the mounting block, a first tube is fixedly connected to the mounting block and the cover, one end of the first tube extends through the through cavity, and the other end extends through the outside of the actuator body, an end of the first tube located outside the actuator body is fixedly connected to an airbag, a second tube is fixedly connected to the mounting block, one end of the second tube extends through the through cavity and the other end extends through the actuator body, and the actuator body and the airbag are both filled with hydraulic oil.

[0007] Further, a sensing mechanism is provided in the mounting block, and the sensing mechanism includes a functional cavity, which is opened in the mounting block, and the mounting block is rotatably connected with a rotating shaft through a bearing, one end of the rotating shaft extends through the through cavity, and the other end extends through the functional cavity and is fixedly connected with a first gear, a side wall of the rotating shaft located in a section of the through cavity is fixedly connected with a plurality of blades, the inner side wall of the functional cavity is rotatably connected with a mounting shaft through a bearing, the mounting shaft is fixedly connected with a second gear, the second gear is meshed with the first gear, the side wall of the mounting shaft is fixedly connected with a paddle plate, the inner side wall of the functional cavity is fixedly connected with a sliding sleeve, the sliding sleeve is slidably sleeved with a slider, a plurality of first springs are fixedly connected between the slider and the sliding sleeve, a button is fixedly connected with the inner top wall of the sliding sleeve, a fixing plate is fixedly connected with the side wall of the slider, a signal transmitter is fixedly connected with the inner side wall of the functional cavity, and the button is electrically connected to the signal transmitter through a wire.

[0008] Furthermore, the sensing mechanism also includes two fixed rods, which are fixedly connected to the bottom wall of the functional cavity, and the two fixed rods are commonly penetrated by an upper conductive plate that is slidably connected, and a plurality of second springs are fixedly connected between the upper conductive plate and the bottom wall of the functional cavity, and an insulating rod is fixedly connected to the lower surface of the upper conductive plate, and the insulating rod is penetrated by a lower conductive plate that is slidably connected, and a plurality of third springs are fixedly connected between the lower conductive plate and the upper conductive plate, and a plurality of baffles are fixedly connected to the inner side wall of the functional cavity, and an inductor is fixedly connected to the bottom wall of the functional cavity, and the upper conductive plate, the lower conductive plate, the inductor and the signal transmitter are electrically connected through wires.

[0009] Furthermore, an anti-rust mechanism is provided at the actuator body, and the anti-rust mechanism includes a rotating seat, and the rotating seat and the actuator body are rotatably connected via a bearing, and a zinc rod is rotatably connected to the upper surface of the rotating seat via a bearing, and a plurality of connecting rods are fixedly connected to the upper surface of the actuator body, and the connecting rods are fixedly connected to the side walls of the zinc rods.

[0010] Furthermore, the rust-proof mechanism also includes a plurality of third tubes, the third tubes are fixedly connected to the upper surface of the rotating seat, the third tubes are sealingly and slidably connected to the first sliding column, the first sliding column is fixedly connected to a scraper at one end outside the third tube, the scraper is against the side wall of the zinc rod, the lower surface of the rotating seat is fixedly connected to a driving rod, the driving rod is rotatably connected to the inner wall of the actuator body through a bearing, the driving rod is fixedly connected to a third gear through, a fourth spring is fixedly connected between the third gear and the inner wall of the actuator body, a servo motor is fixedly connected to the lower surface of the mounting block, the output shaft of the servo motor is fixedly connected to a fourth gear through, the fourth gear is meshed with the third gear, the side wall of the mounting block is fixedly connected to a current sensor controller, and the current sensor controller is electrically connected to the servo motor through a wire.

[0011] Furthermore, the rust-proof mechanism also includes a plurality of fourth tubes, the fourth tubes are fixedly connected to the rotating seat and the corresponding third tubes, one end of the fourth tube extends into the corresponding third tube, and the other end extends into the actuator body, the fourth tube is sealingly and slidably connected to the second sliding column, and the third tube and the fourth tube are both filled with hydraulic oil.

[0012] Furthermore, a sealing rubber ring is provided at the contact point between the sealing cover and the actuator body.

[0013] Furthermore, a cross-sectional area of ​​the second sliding column is smaller than a cross-sectional area of ​​the first sliding column.

[0014] The present invention has the following advantages:

[0015] 1. By setting the airbag and filling the airbag and the actuator body with hydraulic oil at the same time, the underwater pressure is applied to the airbag during underwater use, so that the hydraulic oil in the airbag is pressed into the actuator body, thereby applying pressure inside the actuator body to offset the pressure of the external water on the actuator body, ensuring that the internal and external pressure differences are consistent, and effectively protecting the actuator housing from damage;

[0016] 2. When the actuator body leaks, the external water will enter the actuator body from the leak, so that the hydraulic oil pressed in will be pressed back into the airbag. At this time, the return of the hydraulic oil will cause the shaft to rotate through the blades, and then the first gear and the second gear will mesh, causing the mounting shaft to rotate. Then, the slider will slide up through the contact between the dial plate and the fixed plate, and the button will be pressed, so that the signal transmitter will send a signal to remind the staff that the actuator is leaking, so that it can be discovered and repaired in time.

[0017] 3. During the installation process, as the actuator body goes deeper into the water, the pressure continues to increase. At this time, the airbag will be continuously compressed, causing the shaft to rotate, and then the slider will slide down through the contact between the dial plate and the fixed plate. When the slider slides down, the upper conductive plate will contact the lower conductive plate, and then separate under the elastic force of the spring. Whether they separate is determined by the frequency of the slider sliding down, and the frequency of the slider sliding down is related to the compression speed of the airbag. When the upper conductive plate and the lower conductive plate are in continuous contact, it means that the diving speed is too fast. At this time, the signal transmitter is powered on and sends a signal to remind the staff to dive too fast, thereby avoiding diving too fast and causing pressure changes too fast, which may damage internal components;

[0018] 4. Through the setting of the zinc rod, the zinc rod and the actuator body form a galvanic cell. Through the formation of the galvanic cell, the zinc rod is corroded first, avoiding the actuator shell from being corroded, thereby achieving a certain anti-rust effect;

[0019] 5. The current sensor controller senses the current of the primary battery formed by the zinc rod and the actuator body. When the current is too small, it means that the surface of the zinc rod is seriously corroded, so the servo motor is powered on, and then the third gear and the fourth gear are meshed, and the fourth spring is used to make the rotating seat reciprocate, and the scraper scrapes the surface of the zinc rod to scrape off the rust layer, thereby preventing the surface corrosion of the zinc rod from affecting the anti-rust effect;

[0020] 6. Through the setting of the first slide column and the second slide column, the airbag applies pressure to the inside and also applies pressure to the second slide column through the first slide column, so that the scraper is pressed against the zinc rod with a certain pressure, thereby ensuring the scraping effect;

[0021] 7. As the rust layer on the surface of the zinc rod is scraped off, the zinc rod will gradually become thinner, and the pressure applied by the second slide column can ensure that the scraper will always be in contact with the surface of the zinc rod, thereby ensuring that the scraper can stably scrape off the rust layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an underwater actuator proposed by the present invention;

[0023] Figure 2 for Figure 1 A in the enlarged view;

[0024] Figure 3 A schematic diagram of the internal structure of an underwater actuator proposed by the present invention;

[0025] Figure 4 for Figure 2 The enlarged view of point B in the figure;

[0026] Figure 5 for Figure 2 The enlarged view of point C in the figure;

[0027] Figure 6 This is a structural schematic diagram of a mounting block in an underwater actuator proposed by the present invention;

[0028] Figure 7 A schematic diagram of the internal structure of a functional cavity in an underwater actuator proposed by the present invention;

[0029] Figure 8 This is a schematic structural diagram of a functional cavity in another cross section of an underwater actuator proposed by the present invention.

[0030] In the figure: 1, actuator body; 2, cover; 3, mounting block; 4, first tube; 5, through cavity; 6, second tube; 7, airbag; 8, rotating shaft; 9, blade; 10, functional cavity; 11, first gear; 12, mounting shaft; 13, second gear; 14, dial plate; 15, sliding sleeve; 16, slider; 17, first spring; 18, fixing plate; 19, button; 20, signal transmitter; 21, fixing rod; 22, upper conductive plate; 2 3. Second spring; 24. Insulating rod; 25. Lower conductive plate; 26. Third spring; 27. Baffle; 28. Inductor; 29. ​​Connecting rod; 30. Zinc rod; 31. Rotating seat; 32. Third tube; 33. Fourth tube; 34. First slide column; 35. Second slide column; 36. Scraper; 37. Driving rod; 38. Third gear; 39. Servo motor; 40. Fourth gear; 41. Fourth spring; 42. Current sensor controller. DETAILED DESCRIPTION

[0031] Reference Figure 1-8 A subsea actuator comprises an actuator body 1, a cover 2 is fixedly connected to the side wall of the actuator body 1 by bolts, a mounting block 3 is fixedly connected to the inner side wall of the actuator body 1, a through cavity 5 is opened in the mounting block 3, a first tube 4 is fixedly connected through the mounting block 3 and the cover 2, one end of the first tube 4 extends through the through cavity 5, and the other end extends through the outside of the actuator body 1, an end of the first tube 4 located outside the actuator body 1 is fixedly connected to an airbag 7, a second tube 6 is fixedly connected through the mounting block 3, one end of the second tube 6 extends through the through cavity 5, and the other end extends through the actuator body 1, and the actuator body 1 and the airbag 7 are both filled with hydraulic oil.

[0032] In the process of pushing the actuator body 1 deeper underwater, as the water depth gradually increases, the pressure continues to increase. While the pressure is applied to the outer shell of the actuator body 1, it is also applied to the airbag 7. After the pressure is applied to the airbag 7, the airbag 7 is compressed, and the hydraulic oil in the airbag 7 is pressed into the first tube 4. The hydraulic oil enters the through cavity 5 through the first tube 4, and then enters the actuator body 1 through the second tube 6 from the through cavity 5. By pumping in the hydraulic oil, a certain pressure also exists inside the actuator body 1, ensuring that the pressure difference between the inside and the outside is consistent, and effectively protecting the shell of the actuator body 1 from damage.

[0033] A sensing mechanism is arranged in the mounting block 3, and the sensing mechanism includes a functional cavity 10. The functional cavity 10 is opened in the mounting block 3. The mounting block 3 is rotatably connected with a rotating shaft 8 through a bearing. One end of the rotating shaft 8 extends through the through cavity 5, and the other end extends through the functional cavity 10 and is fixedly connected with a first gear 11. A plurality of blades 9 are fixedly connected to the side wall of a section of the rotating shaft 8 located in the through cavity 5. The blades 9 can rotate under the flow impact of the hydraulic oil when the hydraulic oil passes through the through cavity 5.

[0034] The inner wall of the functional cavity 10 is rotatably connected with an installation shaft 12 through a bearing, and the installation shaft 12 is fixedly connected with a second gear 13, which is meshed with the first gear 11. The number of teeth of the first gear 11 is greater than the number of teeth of the second gear 13, thereby amplifying the rotation of the first gear 11 and better monitoring. A dial plate 14 is fixedly connected to the side wall of the installation shaft 12, and a sliding sleeve 15 is fixedly connected to the inner wall of the functional cavity 10. A slider 16 is slidably sleeved on the sliding sleeve 15, and a damping pad is provided at the sliding connection between the slider 16 and the sliding sleeve 15, so that the sliding between the two is slow and smooth. A plurality of first springs 17 are fixedly connected between the slider 16 and the sliding sleeve 15, a button 19 is fixedly connected to the top wall of the sliding sleeve 15, and a fixing plate 18 is fixedly connected to the side wall of the slider 16. A signal transmitter 20 is fixedly connected to the inner wall of the functional cavity 10, and the button 19 is electrically connected to the signal transmitter 20 through a wire. When the button 19 is pressed, the signal transmitter 20 is energized and sends a signal.

[0035] During the use of the actuator after installation, if the actuator body 1 leaks, due to the leakage, external water will enter the actuator body 1 from the leakage point, causing the hydraulic oil in the actuator body 1 to flow back into the airbag 7, and the airbag 7 gradually recovers. During the reflux of the hydraulic oil, the blade 9 will drive the rotating shaft 8 to rotate in the opposite direction, thereby causing the installation shaft 12 to rotate in the opposite direction. At this time, the dial plate 14 contacts the fixed plate 18, which will cause the fixed plate 18 to drive the slider 16 to slide up. When the slider 16 slides up, it will contact the button 19 and press it, so that the signal transmitter 20 sends a signal to remind the staff that the actuator body 1 has a leak and needs to be repaired in time, so that the condition of the actuator body 1 can be monitored in real time, the leak can be discovered and repaired in time, and its normal use can be ensured.

[0036] The sensing mechanism also includes two fixed rods 21, which are fixedly connected to the inner bottom wall of the functional cavity 10, and the two fixed rods 21 are commonly penetrated by an upper conductive plate 22 for sliding connection, and a plurality of second springs 23 are fixedly connected between the upper conductive plate 22 and the inner bottom wall of the functional cavity 10, and an insulating rod 24 is fixedly connected to the lower surface of the upper conductive plate 22, and the insulating rod 24 is penetrated by a lower conductive plate 25 for sliding connection, and a plurality of third springs 26 are fixedly connected between the lower conductive plate 25 and the upper conductive plate 22, and a plurality of baffles 27 are fixedly connected to the inner side wall of the functional cavity 10, and an inductor 28 is fixedly connected to the inner bottom wall of the functional cavity 10, and the upper conductive plate 22, the lower conductive plate 25, the inductor 28 and the signal transmitter 20 are electrically connected through wires.

[0037] After the upper conductive plate 22 contacts the lower conductive plate 25, the inductor 28 and the signal transmitter 20 can be energized. The setting of the inductor 28 ensures that the circuit will not be turned on when the upper conductive plate 22 and the lower conductive plate 25 just contact. Instead, the inductor 28 is charged first. Only when the inductor 28 is fully charged will the circuit be turned on, thereby ensuring that the signal transmitter 20 will be energized only when the upper conductive plate 22 and the lower conductive plate 25 are continuously in contact.

[0038] After the signal transmitter 20 is powered on, a signal can be generated to alert the staff. This is a prior art and will not be described in detail here. In the process of going deep underwater, when the hydraulic oil is pressed in, the flow of the hydraulic oil will impact the blades 9, causing the blades 9 to drive the shaft 8 to rotate, and the shaft 8 drives the installation shaft 12 to rotate through the meshing of the first gear 11 and the second gear 13. During the rotation of the installation shaft 12, the slider 16 will slide down through the contact between the dial plate 14 and the fixed plate 18. After the dial plate 14 is separated from the fixed plate 18, the slider 16 will reset under the elastic force of the first spring 17. When the slider 16 slides down, it will contact the upper conductive plate 22 and drive it to descend together, so that the upper conductive plate 22 is in contact with the lower conductive plate 25.

[0039] When the penetration speed is normal, the slider 16 is reset after sliding down to the limit position. During the reset process, after the upper conductive plate 22 is separated from the lower conductive plate 25, the paddle plate 14 will contact the fixed plate 18 again, so that the slider 16 slides down again, thereby making the upper conductive plate 22 and the lower conductive plate 25 contact again, that is, the upper conductive plate 22 and the lower conductive plate 25 will be in a process of contact, separation, and contact again, and will not be in a contact state all the time.

[0040] If the diving speed is too fast, the rotation speed of the dial plate 14 is too fast, so that the slider 16 has not yet separated the upper conductive plate 22 and the lower conductive plate 25 during the resetting process, and the dial plate 14 will contact the fixed plate 18 again, so that the slider 16 slides down again. At this time, the upper conductive plate 22 and the lower conductive plate 25 will always be in contact, so that the circuit is turned on until the inductor 28 is fully charged, and the signal transmitter 20 will be powered on to send a signal to remind the staff that the diving speed is too fast and reduce the speed in time, so as to monitor the diving speed and avoid too fast diving speed, which will cause the pressure to increase too quickly and damage the internal components.

[0041] It should be noted that the first spring 17 , the second spring 23 , and the third spring 26 are all made of insulating materials, so as to prevent the springs from accidentally turning on the circuit.

[0042] An anti-rust mechanism is provided at the actuator body 1, and the anti-rust mechanism includes a rotating seat 31. The rotating seat 31 is rotatably connected to the actuator body 1 through a bearing. A zinc rod 30 is rotatably connected to the upper surface of the rotating seat 31 through a bearing. A plurality of connecting rods 29 are fixedly connected to the upper surface of the actuator body 1. The connecting rods 29 are fixedly connected to the side walls of the zinc rods 30. The rotating seat 31 is made of polytetrafluoroethylene, which not only has high strength, but also has strong corrosion resistance and is insulated. The connecting rods 29 are made of zinc, and a primary battery is formed through the zinc rod 30 and the outer shell of the actuator body 1. Through the formation of the primary battery, the zinc rod 30 is corroded first, thereby playing a certain protective role on the outer shell of the actuator body 1.

[0043] The rust prevention mechanism also includes a plurality of third tubes 32, the third tubes 32 are fixedly connected to the upper surface of the rotating seat 31, the third tubes 32 are sealingly and slidably connected to the first sliding column 34, one end of the first sliding column 34 located outside the third tube 32 is fixedly connected to a scraper 36, the scraper 36 is against the side wall of the zinc rod 30, the lower surface of the rotating seat 31 is fixedly connected to a driving rod 37, the driving rod 37 is rotatably connected to the inner wall of the actuator body 1 through a bearing, the driving rod 37 is penetrated and fixedly connected to a third gear 38, the third gear 38 is fixedly connected to the inner wall of the actuator body 1 with a fourth spring 41, the lower surface of the mounting block 3 is fixedly connected to a servo motor 39, the output shaft of the servo motor 39 is penetrated and fixedly connected to a fourth gear 40, and the fourth gear 40 is an incomplete gear (such as Figure 3 As shown), during the rotation of the fourth gear 40, it will periodically mesh with the third gear 38 and then disengage. The fourth gear 40 meshes with the third gear 38. The side wall of the mounting block 3 is fixedly connected with a current sensor controller 42. The current sensor controller 42 is electrically connected to the servo motor 39 through a wire. The current sensor controller 42 is also connected to the zinc rod 30 and the outer shell of the actuator body 1, so as to monitor the current size of the primary battery formed by the two.

[0044] When the current is relatively small, the servo motor 39 will be controlled to start. The current sensor controller 42 is a prior art and will not be described in detail here. The current sensor controller 42 monitors the current of the formed primary battery. When the monitored current is small, it means that the outer oxide layer area of ​​the zinc rod 30 is large, which affects its contact area with water. At this time, the current sensor controller 42 will energize the servo motor 39 to drive the fourth gear 40 to rotate. During the rotation of the fourth gear 40, when it is engaged with the third gear 38, it drives the third gear 38 to rotate. The third gear 38 drives the rotating seat 31 to rotate through the driving rod 37. When the fourth gear 40 is disengaged from the third gear 38, under the elastic force of the fourth spring 41, the third gear 38 reverses and resets, and drives the rotating seat 31 to reverse and reset through the driving rod 37. Therefore, during the rotation of the third gear 38, the rotating seat 31 rotates back and forth in both directions. The rotating seat 31 drives the scraper 36 to reciprocate around the zinc rod 30 through the third tube 32 and the first sliding column 34, and the oxide layer on the surface is scraped off by the scraper 36, thereby preventing the surface of the zinc rod 30 from rusting and affecting the anti-rust effect.

[0045] The rust prevention mechanism also includes a plurality of fourth tubes 33, which are fixedly connected to the rotating seat 31 and the corresponding third tube 32, one end of the fourth tube 33 extends into the corresponding third tube 32, and the other end extends into the actuator body 1, and the fourth tube 33 is sealingly and slidably connected with the second slide column 35, and the third tube 32 and the fourth tube 33 are both filled with hydraulic oil. When the water pressure compresses the airbag 7, the airbag 7 applies pressure to the interior and also applies pressure to the second slide column 35. The second slide column 35 applies a pressure to the first slide column 34 through the hydraulic oil, and the pressure causes the scraper 36 to press against the zinc rod 30 at a certain pressure, thereby ensuring that the scraper 36 can scrape off the oxide layer on the surface.

[0046] It is worth mentioning that as the rust layer on the surface of the zinc rod 30 is scraped off, the zinc rod 30 will gradually become thinner, and the pressure applied by the second sliding column 35 can ensure that the scraper 36 will always be in contact with the surface of the zinc rod 30, thereby ensuring that the scraper 36 can stably scrape off the rust layer.

[0047] A sealing rubber ring is provided at the contact point between the cover 2 and the actuator body 1 , and the provision of the sealing rubber ring prevents leakage from occurring at the gap between the cover 2 and the actuator body 1 .

[0048] The cross-sectional area of ​​the second slide column 35 is smaller than that of the first slide column 34. Since the pressure F=PS, the hydraulic oil cannot be compressed. Therefore, the pressure of the hydraulic oil between the first slide column 34 and the second slide column 35 is equal everywhere. When the pressure is equal, the larger the contact area with the hydraulic oil, the greater the pressure. Therefore, the force applied to the second slide column 35 and the first slide column 34 will become larger. Since water also applies a pressure to the first slide column 34, and the force applied by the second slide column 35 to the first slide column 34 is greater than the force applied by water, the combined force will still cause the first slide column 34 to drive the scraper 36 to resist the zinc rod 30.

[0049] It should be noted that the bearings mentioned in the article are all sealed bearings to avoid leakage at the bearing joints, and the outer shell of the actuator body 1 is coated with a double layer of powder, and the exposed parts and standard parts of the actuator body 1 are made of stainless steel.

[0050] In the present invention, when installing the actuator body 1, the actuator body 1 is immersed underwater. During the immersion process, as the water depth gradually increases, the pressure continues to increase. While the pressure is applied to the outer shell of the actuator body 1, it is also applied to the airbag 7. After the pressure is applied to the airbag 7, the airbag 7 is compressed, and the hydraulic oil in the airbag 7 is pressed into the first tube 4. The hydraulic oil enters the through cavity 5 through the first tube 4, and then enters the actuator body 1 from the through cavity 5 through the second tube 6. By pumping in the hydraulic oil, a certain pressure also exists inside the actuator body 1, ensuring that the pressure difference between the inside and the outside is consistent, and effectively protecting the shell of the actuator body 1 from damage.

[0051] In the process of going deeper underwater, when the hydraulic oil is pressed in, the flow of the hydraulic oil will impact the blades 9, so that the blades 9 drive the rotating shaft 8 to rotate, and the rotating shaft 8 drives the mounting shaft 12 to rotate through the meshing of the first gear 11 and the second gear 13. During the rotation of the mounting shaft 12, the contact between the dial plate 14 and the fixed plate 18 will drive the slider 16 to slide down, and after the dial plate 14 is separated from the fixed plate 18, the slider 16 will be reset under the elastic force of the first spring 17. When the slider 16 slides down, it will contact the upper conductive plate 22 and drive it to descend together, so that the upper conductive plate 22 is in contact with the lower conductive plate 25. When the penetration speed is normal, the slider 16 is reset after it slides down to the limit position. During the resetting process, after the upper conductive plate 22 is separated from the lower conductive plate 25, the paddle plate 14 will contact the fixed plate 18 again, causing the slider 16 to slide down again, thereby causing the upper conductive plate 22 to contact the lower conductive plate 25 again, that is, the upper conductive plate 22 and the lower conductive plate 25 will be in a process of contact, separation, and re-contact, and will not be in a contact state all the time. If the diving speed is too fast, the rotation speed of the paddle plate 14 is too fast at this time, so that the slider 16 has not yet separated from the upper conductive plate 22 and the lower conductive plate 25 during the resetting process, and the paddle plate 14 will contact the fixed plate 18 again, causing the slider 16 to slide down again. At this time, the upper conductive plate 22 and the lower conductive plate 25 will be in a contact state all the time, making the circuit conductive until the inductor 28 is fully charged, which will cause the signal transmitter 20 to be energized and send a signal to remind the staff that the diving speed is too fast and to reduce the speed in time.

[0052] After reaching the designated position, the actuator body 1 is installed. During use after installation, if the actuator body 1 leaks, external water will enter the actuator body 1 from the leak, causing the hydraulic oil in the actuator body 1 to flow back into the airbag 7. The airbag 7 gradually recovers, and during the hydraulic oil reflux, the blade 9 will drive the rotating shaft 8 to rotate in the opposite direction, causing the installation shaft 12 to rotate in the opposite direction. At this time, the dial plate 14 contacts the fixed plate 18, which will cause the fixed plate 18 to drive the slider 16 to slide up. When the slider 16 slides up, it will contact the button 19 and press it, causing the signal transmitter 20 to send a signal to remind the staff that there is a leak in the actuator body 1 and timely maintenance is required.

[0053] During the use of the actuator body 1, a primary battery is formed by the zinc rod 30 and the outer shell of the actuator body 1. The zinc rod 30 is corroded first by the formation of the primary battery, thereby protecting the outer shell of the actuator body 1 to a certain extent. At the same time, the current sensor controller 42 monitors the current of the formed primary battery. When the monitored current is small, it means that the outer oxide layer area of ​​the zinc rod 30 is large, which affects the contact area with water. At this time, the current sensor controller 42 will energize the servo motor 39 to drive the fourth gear 40 to rotate. During the rotation of the fourth gear 40, when it meshes with the third gear 38, the fourth gear 40 When the fourth gear 40 is engaged, the third gear 38 is driven to rotate, and the third gear 38 drives the rotating seat 31 to rotate through the driving rod 37. When the fourth gear 40 is disengaged from the third gear 38, under the elastic force of the fourth spring 41, the third gear 38 is reversed and reset, and the rotating seat 31 is driven to reverse and reset through the driving rod 37. Therefore, during the rotation of the third gear 38, the rotating seat 31 rotates back and forth in both directions. The rotating seat 31 drives the scraper 36 to reciprocate around the zinc rod 30 through the third tube 32 and the first sliding column 34, and the oxide layer on the surface is scraped off by the scraper 36, so as to prevent the surface of the zinc rod 30 from rusting and affecting the anti-rust effect.

[0054] After the oxide layer is scraped off, under the pressure of the second slide post 35 on the first slide post 34, the first slide post 34 will slide outward, so that the scraper 36 continues to contact the surface of the zinc rod 30, ensuring that scraping can be performed in the next rotation.

Claims

1. An underwater actuator, comprising an actuator body (1), characterized in that: The side wall of the actuator body (1) is fixedly connected to a cover (2) by bolts, the inner side wall of the actuator body (1) is fixedly connected to a mounting block (3), a through cavity (5) is provided in the mounting block (3), a first tube (4) is fixedly connected through the mounting block (3) and the cover (2), one end of the first tube (4) extends through the through cavity (5) and the other end extends through the outside of the actuator body (1), an end of the first tube (4) located outside the actuator body (1) is fixedly connected to an air bag (7), a second tube (6) is fixedly connected through the mounting block (3), one end of the second tube (6) extends through the through cavity (5) and the other end extends through the actuator body (1), and the actuator body (1) and the air bag (7) are both filled with hydraulic oil; The mounting block (3) is provided with a sensing mechanism, the sensing mechanism comprising a functional cavity (10), the functional cavity (10) being opened in the mounting block (3), the mounting block (3) being rotatably connected to a rotating shaft (8) through a bearing, one end of the rotating shaft (8) extending through the through cavity (5), the other end extending through the functional cavity (10) and being fixedly connected to a first gear (11), a side wall of a section of the rotating shaft (8) located in the through cavity (5) being fixedly connected to a plurality of blades (9), an inner side wall of the functional cavity (10) being rotatably connected to a mounting shaft (12) through a bearing, the mounting shaft (12) being fixedly connected to a second gear (13) , the second gear (13) is meshed with the first gear (11), the side wall of the installation shaft (12) is fixedly connected with a shift plate (14), the inner wall of the functional cavity (10) is fixedly connected with a sliding sleeve (15), the sliding sleeve (15) is slidably connected with a slider (16), a plurality of first springs (17) are fixedly connected between the slider (16) and the sliding sleeve (15), the inner top wall of the sliding sleeve (15) is fixedly connected with a button (19), the side wall of the slider (16) is fixedly connected with a fixing plate (18), the inner wall of the functional cavity (10) is fixedly connected with a signal transmitter (20), and the button (19) and the signal transmitter (20) are electrically connected through a wire; The actuator body (1) is provided with an anti-rust mechanism, the anti-rust mechanism comprising a rotating seat (31), the rotating seat (31) and the actuator body (1) are rotatably connected via a bearing, a zinc rod (30) is rotatably connected to the upper surface of the rotating seat (31) via a bearing, a plurality of connecting rods (29) are fixedly connected to the upper surface of the actuator body (1), and the connecting rods (29) are fixedly connected to the side walls of the zinc rods (30); The rust prevention mechanism also includes a plurality of third tubes (32), the third tubes (32) are fixedly connected to the upper surface of the rotating seat (31), the third tubes (32) are sealingly and slidably connected to a first sliding column (34), one end of the first sliding column (34) located outside the third tube (32) is fixedly connected to a scraper (36), the scraper (36) is against the side wall of the zinc rod (30), the lower surface of the rotating seat (31) is fixedly connected to a driving rod (37), the driving rod (37) is rotatably connected to the inner wall of the actuator body (1) through a bearing, and the driving rod (37) ) is fixedly connected with a third gear (38) passing through it, a fourth spring (41) is fixedly connected between the third gear (38) and the inner wall of the actuator body (1), a servo motor (39) is fixedly connected to the lower surface of the mounting block (3), an output shaft of the servo motor (39) is fixedly connected with a fourth gear (40), the fourth gear (40) is meshed with the third gear (38), a current sensor controller (42) is fixedly connected to the side wall of the mounting block (3), and the current sensor controller (42) is electrically connected to the servo motor (39) through a wire.

2. The underwater actuator according to claim 1, characterized in that: The sensing mechanism further comprises two fixed rods (21), the fixed rods (21) being fixedly connected to the inner bottom wall of the functional cavity (10), the two fixed rods (21) being slidably connected to an upper conductive plate (22) penetrating the two fixed rods together, a plurality of second springs (23) being fixedly connected between the upper conductive plate (22) and the inner bottom wall of the functional cavity (10), an insulating rod (24) being fixedly connected to the lower surface of the upper conductive plate (22), the insulating rod (24) being slidably connected to a lower conductive plate (25), a plurality of third springs (26) being fixedly connected between the lower conductive plate (25) and the upper conductive plate (22), a plurality of baffles (27) being fixedly connected to the inner side wall of the functional cavity (10), an inductor (28) being fixedly connected to the inner bottom wall of the functional cavity (10), and the upper conductive plate (22), the lower conductive plate (25), the inductor (28) and the signal transmitter (20) being electrically connected via a wire.

3. The underwater actuator according to claim 2, characterized in that: The rust prevention mechanism further comprises a plurality of fourth tubes (33), wherein the fourth tubes (33) are fixedly connected to the rotating seat (31) and the corresponding third tubes (32), one end of the fourth tube (33) extends through the corresponding third tube (32), and the other end extends through the actuator body (1), the fourth tube (33) is sealingly and slidably connected to a second sliding column (35), and the third tube (32) and the fourth tube (33) are both filled with hydraulic oil.

4. The underwater actuator according to claim 1, characterized in that: A sealing rubber ring is provided at the contact point between the sealing cover (2) and the actuator body (1).

5. The underwater actuator according to claim 3, characterized in that: The cross-sectional area of ​​the second sliding column (35) is smaller than the cross-sectional area of ​​the first sliding column (34).

Images