Special high-pressure pneumatic actuating mechanism for marine environment

Abstract

The utility model relates to the technical field of actuators, in particular to a special high-pressure pneumatic actuating mechanism for a marine environment, which comprises a side cylinder barrel and a middle body which are communicated with each other, the middle body is arranged on one side of the side cylinder barrel, and one side of the middle body is communicated with an actuator cylinder body; a piston is arranged along the inner wall of the side cylinder barrel in a sliding mode, a driving rod is fixedly arranged on the side end face, close to the middle body, of the piston, the other end of the driving rod extends into the middle body, and a rack is arranged on the side end face, close to the actuator cylinder body, of the driving rod. By means of the technical scheme, the actuator has the advantages that the positioning accuracy and the stability are improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to an actuator, in particular to a high-pressure pneumatic actuator specially used in marine environment. Background Art

[0002] Rack and pinion pneumatic actuators are widely used in power plants, chemical industry, oil refining and other production processes with high safety requirements due to their simple structure, stable and reliable operation, and safety and explosion-proof characteristics.

[0003] The actuators currently on the market use a single large cylinder. In actual operation, the air source force of the actuator and the meshing point of the gear rack are not on the same straight line, which will cause a lateral component force to be generated and increase the lateral cantilever force of the actuator, thereby interfering with the positioning accuracy and overall stability of the actuator, thereby affecting the accuracy and safety of the actuator; in addition, the larger lateral cantilever force will increase the wear of the actuator, thereby shortening the service life of the actuator. Utility Model Content

[0004] In order to solve the problems in the related art, the present application provides a high-pressure pneumatic actuator specially designed for marine environment, which solves the problems of poor positioning accuracy, overall stability and low service life.

[0005] The technical solution is as follows:

[0006] A high-pressure pneumatic actuator for marine environment, comprising a side cylinder barrel and an intermediate body arranged in a connected state, wherein the intermediate body is arranged on one side of the side cylinder barrel, and is characterized in that one side of the intermediate body is connected to an actuator cylinder body;

[0007] A piston is slidably arranged along the inner wall of the side cylinder, a driving rod is fixedly arranged on the side end face of the piston close to the intermediate body, the other end of the driving rod extends into the intermediate body, a rack is arranged on the side end face of the driving rod close to the actuator cylinder body, and a gear meshing with the rack is arranged in the actuator cylinder body.

[0008] Through the above technical solution, by making the actuator cylinder body offset design, the air source force and the meshing point of the gear rack are in the same straight line, which will eliminate the lateral cantilever force generated by the integrated actuator cylinder body, thereby improving the positioning accuracy and stability of the device, thereby ensuring the accuracy, safety and service life of the device.

[0009] Preferably, a first groove is provided on the rack, and the first groove is provided along the length direction of the rack, and a guide key is provided along the length direction of the first groove; a second groove corresponding to and matching the position of the guide key is provided along the outer periphery of the gear.

[0010] Through the above technical solution, by setting the guide key, the two gears can be guided during the meshing transmission process, thereby increasing the service life of the device.

[0011] Preferably, a left cylinder head is provided at one end of the side cylinder away from the intermediate body, and a first gas source interface is provided on the left cylinder head. A second gas source interface is provided on the side end surface of the intermediate body away from the side cylinder, and both the first gas source interface and the second gas source interface are arranged in a straight-through shape.

[0012] Through the above technical solution, by setting the straight-through first gas source interface and the second gas source interface, the CV value can be increased, the gas flow capacity can be improved, and the rapid opening and closing of the device can be achieved, thereby ensuring the accuracy of the device.

[0013] Preferably, two third grooves are arranged along the periphery of the outer wall of the piston, and a Variseal sealing ring is arranged in each of the two third grooves.

[0014] Through the above technical solution, by setting the Variseal seal ring, the friction between the outer wall of the piston and the inner wall of the side cylinder can be reduced, the starting resistance can be small, the service life of the piston can be improved, and the oil-free lubrication seal of the piston can be achieved, ensuring that the service life of the Variseal seal ring and the device is equal.

[0015] Preferably, a gear shaft coaxially matched with the gear is provided in the actuator cylinder body, and two fourth grooves are provided on the outer peripheries of the upper and lower ends of the gear shaft, a star-shaped sealing ring is provided in the fourth groove of the gear shaft close to the gear, and a Van Seal sealing ring is provided in the fourth groove of the gear shaft away from the gear.

[0016] Through the above technical solution, through the combined design of the star-shaped sealing ring and the Varisal sealing ring, it can be ensured that the device can work for a long time even in a high-pressure and highly corrosive environment, thereby increasing the service life of the device.

[0017] Preferably, a boss is provided on the outer periphery of one end of the intermediate body close to the side cylinder barrel, and a plurality of bolts with consistent structures are provided on the outer periphery of the side cylinder barrel, and the two ends of each bolt respectively pass through the left cylinder head and the boss, so that the left cylinder head and the intermediate body are fixedly connected.

[0018] In summary, the beneficial effects of a high-pressure pneumatic actuator specially designed for marine environment are:

[0019] 1. By making the actuator cylinder offset, the air source force and the meshing point of the gear rack are on the same straight line, which will eliminate the lateral cantilever force generated by the integrated actuator cylinder, thereby improving the positioning accuracy and stability of the device, thereby ensuring the accuracy, safety and service life of the device;

[0020] 2. By setting the guide key, the two gears can be guided during the meshing transmission process, thereby increasing the service life of the device;

[0021] 3. By setting the straight-through first gas source interface and the second gas source interface, the CV value can be increased, the gas flow capacity can be improved, and the rapid opening and closing of the device can be realized, thereby ensuring the accuracy of the device;

[0022] 4. By setting the Variseal seal ring, the friction between the outer wall of the piston and the inner wall of the side cylinder can be reduced, the starting resistance can be reduced, the service life of the piston can be increased, and the oil-free lubrication seal of the piston can be realized, ensuring that the service life of the Variseal seal ring is equal to that of the device;

[0023] 5. The combined design of star-shaped sealing ring and wide-seal sealing ring can ensure long-term operation even in high-pressure and highly corrosive environments, thereby increasing the service life of the device.

[0024] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a left view of the utility model;

[0028] Figure 3 for Figure 2 Cross-sectional view in the BB direction;

[0029] Figure 4 This is a schematic diagram of the gear and rack matching in the utility model;

[0030] Figure 5 for Figure 4 A partial enlarged view of the label A;

[0031] Figure 6 It is a schematic diagram of the structure of the gear in the utility model;

[0032] In the figure, 1, side cylinder; 2, intermediate body; 3, actuator cylinder; 4, piston; 5, driving rod; 6, rack; 7, gear; 8, first groove; 9, guide key; 10, second groove; 11, left cylinder cover; 12, first air source interface; 13, second air source interface; 14, third groove; 15, gear shaft; 16, fourth groove; 17, boss; 18, bolt. DETAILED DESCRIPTION

[0033] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims.

[0034] In a possible embodiment, as shown in the attached Figure 1-6 As shown, a high-pressure pneumatic actuator specially used in a marine environment comprises a side cylinder 1 and an intermediate body 2 which are connected in a connected state. The intermediate body 2 is arranged on one side of the side cylinder 1, and one side of the intermediate body 2 is connected to an actuator cylinder 3; a piston 4 is slidably arranged along the inner wall of the side cylinder 1, a driving rod 5 is fixedly arranged on the side end face of the piston 4 close to the intermediate body 2, and the other end of the driving rod 5 extends into the intermediate body 2, a rack 6 is arranged on the side end face of the driving rod 5 close to the actuator cylinder 3, and a gear 7 which is meshed with the rack 6 is arranged in the actuator cylinder 3. In this embodiment, after the modulus of the gear 7 is increased, the diameter of the piston 4 is reduced under the same torque, thereby reducing the gas consumption and achieving energy saving and environmental protection; by making the actuator cylinder 3 offset, the meshing point of the gas source force and the gear 7 and rack 6 can be on the same straight line, which will eliminate the lateral cantilever force generated by the integrated actuator cylinder, thereby improving the positioning accuracy and stability of the device, thereby ensuring the accuracy, safety and service life of the device.

[0035] A first groove 8 is provided on the rack 6, and the first groove 8 is provided along the length direction of the rack 6. In the present embodiment, the first groove 8 is provided in the middle part of the rack 6, and a guide key 9 is provided along the length direction of the first groove 8; a second groove 10 corresponding to and matching the position of the guide key 9 is provided along the outer periphery of the gear 7; through the cooperation of the guide key 9 and the second groove 10, the two gears 7 can be guided during the meshing transmission process, thereby improving the service life of the device.

[0036] A left cylinder cover 11 is provided at one end of the side cylinder 1 away from the intermediate body 2, and a first gas source interface 12 is provided on the left cylinder cover 11. A second gas source interface 13 is provided on the side end surface of the intermediate body 2 away from the side cylinder 1, and the first gas source interface 12 and the second gas source interface 13 are both arranged in a straight-through shape; the CV value can be increased by the straight-through first gas source interface 12 and the second gas source interface 13, thereby improving the gas circulation capacity, thereby realizing the rapid opening and closing of the device, thereby ensuring the accuracy of the device.

[0037] Two third grooves 14 are arranged along the periphery of the outer wall of the piston 4, and a Variseal seal is arranged in each of the two third grooves 14; the Variseal seal can reduce the friction between the outer wall of the piston 4 and the inner wall of the side cylinder 1, reduce the starting resistance, and increase the service life of the piston 4, and realize the oil-free lubrication and sealing of the piston 4, ensuring that the service life of the Variseal seal is equal to that of the device.

[0038] A gear shaft 15 coaxially matched with the gear 7 is arranged in the actuator cylinder body 3. Two fourth grooves 16 are provided on the outer peripheries of the upper end and the lower end of the gear shaft 15. A star-shaped sealing ring is arranged in the fourth groove 16 of the gear shaft 15 close to the gear 7, and a Variseal sealing ring is arranged in the fourth groove 16 of the gear shaft 15 far from the gear 7. The combined design of the star-shaped sealing ring and the Variseal sealing ring on the gear shaft 15 can ensure that the device can work for a long time in a high-pressure and high-corrosive environment, thereby improving the service life of the device.

[0039] A boss 17 is provided at the outer periphery of one end of the intermediate body 2 close to the side cylinder barrel 1, and a plurality of bolts 18 with the same structure are provided at the outer periphery of the side cylinder barrel 1. The two ends of each bolt 18 pass through the left cylinder head 11 and the boss 17 respectively, so that the left cylinder head 11 and the intermediate body 2 are fixedly connected. In this embodiment, the bolts 18 are stud bolts, such as Figure 2 shown.

[0040] In this specific embodiment, the actuator cylinder body 3, the intermediate body 2, the side cylinder barrel 1 and the left cylinder head 11 are all made of aluminum bronze castings, and the gear shaft 15 and the hardware used in this device are all made of duplex stainless steel; the lubricating oil in this device is perfluoropolyether grease; after the above settings, the device can work normally under the working condition of 7 meters deep sea water.

[0041] Working principle: the first gas source interface 12 and the second gas source interface 13 are both connected to the external gas supply device, which provides gas to the side cylinder 1 through the first gas source interface 12, and the gas pushes the piston 4 to move along the inner chamber of the side cylinder 1 toward the intermediate body 2, and the rack 6 on one side of the piston 4 moves synchronously along the inner chamber of the intermediate body 2, and the guide key 9 on the rack 6 guides the gear 7 to ensure that the gear 7 rotates in the correct position, and drives the external valve on the actuator cylinder body 3 to rotate through the coaxial gear shaft 15; when it is necessary to control the valve to return to its original position, the external gas supply device provides gas to the intermediate body 2 through the second gas source interface 13, and the gas pushes the rack 6 to move toward that side cylinder 1, the gear 7 rotates in the opposite direction, and the piston 4 moves toward the left cylinder head 11.

[0042] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not present in the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0043] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A high-pressure pneumatic actuator for marine environment, comprising a side cylinder and an intermediate body arranged in a connected state, wherein the intermediate body is arranged on one side of the side cylinder, characterized in that: One side of the intermediate body is connected to an actuator cylinder; A piston is slidably arranged along the inner wall of the side cylinder, a driving rod is fixedly arranged on the side end face of the piston close to the intermediate body, the other end of the driving rod extends into the intermediate body, a rack is arranged on the side end face of the driving rod close to the actuator cylinder body, and a gear meshing with the rack is arranged in the actuator cylinder body.

2. The high-pressure pneumatic actuator for marine environment according to claim 1, characterized in that: The rack is provided with a first groove, and the first groove is provided along the length direction of the rack, and a guide key is provided along the length direction of the first groove; a second groove corresponding to and matching the guide key is provided along the outer periphery of the gear.

3. The high-pressure pneumatic actuator for marine environment according to claim 1, characterized in that: A left cylinder head is provided at one end of the side cylinder away from the intermediate body, and a first gas source interface is provided on the left cylinder head. A second gas source interface is provided on the side end surface of the intermediate body away from the side cylinder, and both the first gas source interface and the second gas source interface are arranged in a straight-through shape.

4. The high-pressure pneumatic actuator for marine environment according to claim 1, characterized in that: Two third grooves are arranged along the periphery of the outer wall of the piston, and a Variseal sealing ring is arranged in each of the two third grooves.

5. The high-pressure pneumatic actuator for marine environment according to claim 1, characterized in that: A gear shaft coaxially matched with the gear is arranged in the actuator cylinder body, and two fourth grooves are arranged on the outer peripheries of the upper end and the lower end of the gear shaft. A star-shaped sealing ring is arranged in the fourth groove of the gear shaft close to the gear, and a pan-seal sealing ring is arranged in the fourth groove of the gear shaft away from the gear.

6. The high-pressure pneumatic actuator for marine environment according to claim 3, characterized in that: A boss is provided on the outer periphery of one end of the intermediate body close to the side cylinder barrel, and a plurality of bolts with the same structure are provided on the outer periphery of the side cylinder barrel, and the two ends of each bolt pass through the left cylinder cover and the boss respectively, so that the left cylinder cover and the intermediate body are fixedly connected.

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