A grinding device for the valve port of a marine air valve

Abstract

This invention belongs to the technical field of valve processing equipment, and particularly relates to a grinding device for marine valve ports, including a machine base and a grinding station. The grinding station includes a pressing mechanism, an air-floating mechanism, and a rotary drive mechanism. The air-floating mechanism includes a fixed base, a main shaft, a lower support ring, and a lower ball basin. The marine valve port grinding device provided in this application can drive the lower ball basin to simultaneously achieve rotational and oscillating motions, ensuring that all parts of the valve are uniformly ground, improving the surface quality and optical precision of the valve. By setting an air inlet on the lower support ring and connecting an external air source, the lower ball basin can be floated on the top side of the lower support ring, forming an air film between the lower ball basin and the lower support ring, avoiding direct contact between the two, reducing frictional resistance, making the rotational motion of the lower ball basin smoother, effectively increasing the rotational speed, and improving the grinding efficiency and uniformity of the valve.

Description

Technical Field

[0001] This invention belongs to the technical field of marine engine parts processing equipment, and particularly relates to a grinding device for marine air valve ports. Background Technology

[0002] Marine air valves are one of the core components of marine engines, and the machining accuracy of their valve port sealing surface directly affects the engine's airtightness, power performance, and service life. Air valve ports are typically tapered sealing surfaces, requiring grinding processes to ensure their surface roughness and roundness, guaranteeing a tight fit with the valve seat.

[0003] Existing marine air valve orifice grinding devices generally adopt a "fixed fulcrum + back-and-forth swing" grinding method. Its structural principle is as follows: the air valve is fixed to a swing mechanism, and a drive mechanism drives the air valve to swing back and forth around a fixed axis, causing relative friction between the valve orifice and the grinding medium to achieve grinding. However, this traditional grinding method has the following shortcomings:

[0004] The grinding trajectory is singular: the air valve can only swing back and forth along a fixed axis. The contact trajectory between the grinding medium and the valve port sealing surface is a linear reciprocating motion, which cannot cover the entire area of ​​the sealing surface. This results in local over-grinding and local under-grinding of the sealing surface, with "striped" grinding marks. The roundness and flatness errors of the sealing surface are also large. Low grinding efficiency: The single back-and-forth oscillating friction method results in uneven pressure distribution between the grinding medium and the valve port, insufficient friction intensity in some areas, requiring extended grinding time to meet requirements, and the improvement in wear resistance and sealing performance of the sealing surface after grinding is limited. Summary of the Invention

[0005] The purpose of this invention is to provide a grinding device for marine air valve ports, which aims to solve the technical problems of uneven grinding and low efficiency caused by the existing marine air valve port grinding devices, which can only achieve back-and-forth swing grinding and have a single trajectory.

[0006] To achieve the above objectives, the present invention provides a grinding device for marine air valve ports, comprising a machine base and multiple grinding stations, wherein the multiple grinding stations are evenly arranged on the machine base; each grinding station includes a pressing mechanism, an air flotation mechanism, and a rotary drive mechanism, wherein the pressing mechanism and the air flotation mechanism are both disposed on the machine base, the air flotation mechanism is disposed at the bottom of the pressing mechanism, and the rotary drive mechanism is disposed on the machine base and connected to the air flotation mechanism; The air flotation mechanism includes a fixed base, a main shaft, a lower support ring, and a lower ball basin. The main shaft is fixedly mounted on the fixed base and connected to the lower ball basin and a rotary drive mechanism. The lower support ring is mounted on the machine base and has an air inlet. The air inlet is used to connect to an external air source and allows the lower ball basin to float on the top side of the lower support ring.

[0007] As an optional embodiment of the present invention, the lower support ring is arranged in a ring shape, and four air inlets are provided and evenly distributed on the side of the lower support ring.

[0008] As an optional embodiment of the present invention, the air flotation mechanism further includes a waterproof basin and a waterproof cover, wherein the waterproof basin is fixedly connected to the inner side of the lower ball basin, and the waterproof cover is fixedly connected to the top side of the waterproof basin; a drain pipe is provided on the side of the lower ball basin.

[0009] As an optional embodiment of the present invention, the pressing mechanism includes a fixed frame, a pressing cylinder, a movable frame, a lower shaft core, a limiting frame, a buffer spring, and a buffer cylinder. The fixed frame is fixedly connected to the machine base. The pressing cylinder is fixedly connected to the fixed frame and to the movable frame. One end of the lower shaft core is fixedly connected to the movable frame, and the other end is disposed inside the waterproof cover and above the main shaft. The limiting frame is fixedly connected to the fixed frame. The buffer spring is disposed inside the limiting frame and abuts against the lower shaft core and the limiting frame respectively. The buffer cylinder is fixedly connected to the fixed frame and to the movable frame.

[0010] As an optional embodiment of the present invention, the rotary drive mechanism includes a motor plate, a rotary drive motor, a drive pulley, a transmission belt, and a driven pulley. The motor plate is fixedly connected to the machine base, the rotary drive motor is fixedly connected to the motor plate, the drive pulley is fixedly connected to the rotary drive motor, the transmission belt is fixedly wound around the drive pulley and the driven pulley respectively, and the driven pulley is fixedly connected to the outside of the main shaft.

[0011] As an optional embodiment of the present invention, it further includes a swing adjustment mechanism, which is respectively disposed in the air flotation mechanism and the position adjustment mechanism; the swing adjustment mechanism includes a swing motor, a swing shaft, a swing cover, a swing slider, a swing slide rail, a swing screw, and an eccentric swing rod. The swing motor is fixedly connected to the position adjustment mechanism. One end of the swing shaft is fixedly installed in the swing motor, and the other end passes through the swing cover and is fixedly connected to the swing slider. The swing slider is movably disposed in the swing cover and slidably connected to the swing slide rail. The swing slide rail is fixedly connected to the swing cover. The swing screw is threadedly connected to the swing slider and rotatably connected to the swing cover. One end of the eccentric swing rod is fixedly connected to the swing cover, and the other end is fixedly connected to the fixed base.

[0012] As an optional embodiment of the present invention, a position adjustment mechanism is further included, which is respectively disposed on the machine base and the swing adjustment mechanism; the position adjustment mechanism includes an adjustment handwheel, an adjustment screw, an adjustment nut, an adjustment plate, a limit plate, a guide wheel, and a limit guide rail. The adjustment handwheel is fixedly connected to the adjustment screw, the adjustment nut is threadedly connected to the adjustment screw and fixedly connected to the adjustment plate, the limit plate is fixedly connected to the side of the adjustment plate, the guide wheel is rotatably connected to the limit plate and slidably connected to the limit guide rail, and the limit guide rail is fixedly connected to the machine base.

[0013] As an optional embodiment of the present invention, multiple guide wheels are provided and are evenly distributed on the limiting plate, and the multiple guide wheels are provided on the upper and lower sides of the limiting guide rail.

[0014] The above-mentioned technical solutions of the grinding device for marine air valve ports provided in the embodiments of the present invention have at least one of the following technical effects: 1. This invention integrates three motion modes: "air flotation + rotary grinding + multi-angle swinging". The air flotation mechanism suspends the lower ball basin on the lower support ring through an external air source, realizing adaptive fine adjustment of the lower ball basin and compensating for valve installation errors and original shape deviations of the sealing surface. The rotary drive mechanism drives the lower ball basin and the valve to rotate synchronously, forming a circumferential grinding trajectory. The swinging adjustment mechanism drives the fixed seat to swing at multiple angles (instead of the traditional single back-and-forth swinging) through an eccentric swing rod, so that the grinding trajectory forms a composite trajectory of "rotation + multi-directional swinging", which fully covers the valve sealing surface and completely solves the problem of uneven grinding caused by traditional back-and-forth swinging. 2. Position adjustment allows for precise manual control via a handwheel, while the swing angle and rotation speed can be steplessly adjusted via motor parameters; compared to traditional single swing, the composite grinding trajectory significantly reduces grinding time and eliminates the need for subsequent re-grinding processes, thereby significantly improving processing efficiency and reducing labor costs; 3. During the manufacturing process of the air valve, the valve port needs to be finely ground through the grinding station to make the side of the valve port ring smooth and ensure sealing performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A perspective view of a grinding device for marine air valve orifices provided in an embodiment of the present invention.

[0017] Figure 2 A perspective view of the grinding station of the marine air valve port grinding device provided in an embodiment of the present invention.

[0018] Figure 3 A perspective view of the pressing mechanism of the grinding device for the valve port of a marine air valve provided in an embodiment of the present invention.

[0019] Figure 4 A perspective view of the air flotation mechanism of the grinding device for the valve port of a marine air valve provided in an embodiment of the present invention.

[0020] Figure 5 A perspective view of the air flotation mechanism of the marine air valve port grinding device provided in an embodiment of the present invention, omitting the waterproof cover.

[0021] Figure 6 This is a perspective view of the grinding station of the marine air valve port grinding device provided in an embodiment of the present invention, omitting the pressing mechanism.

[0022] Figure 7 This is a perspective view of the grinding station of the marine air valve port grinding device provided in an embodiment of the present invention, omitting the pressing mechanism.

[0023] Figure 8 A perspective view of the swing adjustment mechanism of the grinding device for the valve port of a marine air valve provided in an embodiment of the present invention.

[0024] Figure 9 The perspective view of the swing adjustment mechanism of the grinding device for the valve port of the marine air valve provided in the embodiment of the present invention, omitting the swing cover.

[0025] The following are the labeling elements in the figure: 1. Machine base; 2. Pressing mechanism; 3. Air flotation mechanism; 4. Rotary drive mechanism; 5. Swing adjustment mechanism; 6. Position adjustment mechanism; 21. Fixed frame; 22. Downward pressing cylinder; 23. Movable frame; 24. Lower shaft core; 25. Limiting frame; 26. Buffer spring; 27. Buffer cylinder; 31. Mounting base; 32. Spindle; 33. Lower support ring; 34. Lower ball bearing; 35. Waterproof basin; 36. Waterproof cover; 37. Air inlet; 38. Drain pipe; 41. Motor board; 42. Rotary drive motor; 44. Transmission belt; 45. Driven pulley; 51. Oscillating motor; 52. Oscillating shaft; 53. Oscillating cover; 54. Oscillating slider; 55. Oscillating slide rail; 56. Oscillating screw; 57. Eccentric rocker arm; 61. Adjusting handwheel; 62. Adjusting screw; 63. Adjusting nut; 64. Adjusting plate; 65. Limiting plate; 66. Guide wheel; 67. Limiting guide rail. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0030] In one embodiment of the present invention, such as Figures 1-9 As shown, a grinding device for marine air valve ports is provided, including a machine base 1 and grinding stations. Four grinding stations are provided and evenly arranged on the machine base 1, which can perform grinding operations on four air valves at the same time, thereby improving production efficiency.

[0031] The grinding station includes a pressing mechanism 2, an air flotation mechanism 3, a rotary drive mechanism 4, a swing adjustment mechanism 5, and a position adjustment mechanism 6. The pressing mechanism 2 and the air flotation mechanism 3 are both located on the machine base 1. The air flotation mechanism 3 is located at the bottom of the pressing mechanism 2. The rotary drive mechanism 4 is located on the machine base 1 and connected to the air flotation mechanism 3 to provide rotational power for the air flotation mechanism 3. The swing adjustment mechanism 5 is connected to the air flotation mechanism 3 and is used to adjust the swing angle of the air flotation mechanism 3. The position adjustment mechanism 6 is located on the machine base 1 and connected to the swing adjustment mechanism 5 to adjust the position of the entire air flotation mechanism 3.

[0032] The air flotation mechanism 3 includes a fixed base 31, a main shaft 32, a lower support ring 33, and a lower ball basin 34. The fixed base 31 is connected to the swing adjustment mechanism 5. The main shaft 32 is fixedly installed on the fixed base 31 and is connected to the lower ball basin 34 and the rotary drive mechanism 4 respectively. The rotary drive mechanism 4 drives the lower ball basin 34 to rotate through the main shaft 32. The lower support ring 33 is installed on the machine base 1 and is provided with an air inlet 37. The air inlet 37 is used to connect to an external air source. The external air source delivers gas between the lower support ring 33 and the lower ball basin 34 through the air inlet 37 to form an air film, which floats the lower ball basin 34 on the top side of the lower support ring 33, reducing the frictional resistance when the lower ball basin 34 rotates.

[0033] The lower support ring 33 is arranged in a ring shape to match the shape of the lower ball basin 34. Four air inlets 37 are provided and are evenly arranged on the side of the lower support ring 33 so that the gas can enter evenly between the lower support ring 33 and the lower ball basin 34, ensuring the stability and uniformity of the air film, thereby enabling the lower ball basin 34 to float smoothly.

[0034] The air flotation mechanism 3 also includes a waterproof basin 35 and a waterproof cover 36. The waterproof basin 35 is fixedly connected to the inside of the lower ball basin 34 to collect the wastewater generated during the grinding process. The waterproof cover 36 is fixedly connected to the top of the waterproof basin 35 to prevent wastewater from splashing out. A drain pipe 38 is provided on the side of the lower ball basin 34 to discharge the wastewater collected in the waterproof basin 35.

[0035] The pressing mechanism 2 includes a fixed frame 21, a pressing cylinder 22, a movable frame 23, a lower shaft core 24, a limit frame 25, a buffer spring 26, and a buffer cylinder 27. The fixed frame 21 is fixedly connected to the machine base 1, providing support for the entire pressing mechanism 2. The pressing cylinder 22 is fixedly connected to the fixed frame 21 and to the movable frame 23. The pressing cylinder 22 drives the movable frame 23 to move up and down. One end of the lower shaft core 24 is fixedly connected to the movable frame 23, and the other end is placed inside the waterproof cover 36 and mounted on the main shaft 32. Above, the movable frame 23 drives the lower shaft core 24 to move up and down, thereby pressing down and fixing the air valve placed on the lower shaft core 24; the limiting frame 25 is fixedly connected to the fixed frame 21, and the buffer spring 26 is set inside the limiting frame 25 and abuts against the lower shaft core 24 and the limiting frame 25 respectively, playing a buffering role to prevent the lower shaft core 24 from causing excessive impact on the air valve; the buffer cylinder 27 is fixedly connected to the fixed frame 21 and fixedly connected to the movable frame 23, assisting the working of the pressing cylinder 22 and improving the stability of the downward pressure.

[0036] The rotary drive mechanism 4 includes a motor plate 41, a rotary drive motor 42, a drive pulley, a transmission belt 44, and a driven pulley 45. The motor plate 41 is fixedly connected to the machine base 1, the rotary drive motor 42 is fixedly connected to the motor plate 41, the drive pulley is fixedly connected to the output shaft of the rotary drive motor 42, the transmission belt 44 is fixedly wound around the drive pulley and the driven pulley 45 respectively, and the driven pulley 45 is fixedly connected to the outside of the main shaft 32. The rotary drive motor 42 drives the drive pulley to rotate, and drives the driven pulley 45 to rotate through the transmission belt 44, thereby driving the main shaft 32 and the lower ball basin 34 to rotate.

[0037] The swing adjustment mechanism 5 includes a swing motor 51, a swing shaft 52, a swing cover 53, a swing slider 54, a swing slide rail 55, a swing screw 56, and an eccentric swing rod 57. The swing motor 51 is fixedly connected to the position adjustment mechanism 6. One end of the swing shaft 52 is fixedly installed on the output shaft of the swing motor 51, and the other end passes through the swing cover 53 and is fixedly connected to the swing slider 54. The swing motor 51 drives the swing shaft 52 to rotate, which in turn drives the swing slider 54 to rotate. The swing slider 54 is movably disposed in the swing cover 53 and slidably connected to the swing slide rail. 55. The swing slide rail 55 is fixedly connected inside the swing cover 53 and guides the movement of the swing slider 54. The swing screw 56 is threadedly connected to the swing slider 54 and rotatably connected to the swing cover 53. By rotating the swing screw 56, the position of the swing slider 54 on the swing slide rail 55 can be adjusted. One end of the eccentric swing rod 57 is fixedly connected to the swing cover 53 and the other end is fixedly connected to the fixed seat 31. The movement of the swing slider 54 drives the fixed seat 31 to swing through the swing cover 53 and the eccentric swing rod 57, thereby realizing the adjustment of the swing amplitude of the lower ball basin 34.

[0038] The position adjustment mechanism 6 includes an adjusting handwheel 61, an adjusting screw 62, an adjusting nut 63, an adjusting plate 64, a limiting plate 65, guide wheels 66, and a limiting guide rail 67. The adjusting handwheel 61 is fixedly connected to the adjusting screw 62. Rotating the adjusting handwheel 61 drives the adjusting screw 62 to rotate. The adjusting nut 63 is threadedly connected to the adjusting screw 62 and fixedly connected to the adjusting plate 64. Rotation of the adjusting screw 62 drives the adjusting nut 63 and the adjusting plate 64 to move. The limiting plate 65 is fixedly connected to the side of the adjusting plate 64. The guide wheels 66 are rotatably connected to the limiting plate 65 and slidably connected to the limiting guide rail 67, guiding and limiting the movement of the adjusting plate 64 to ensure smooth movement. The limiting guide rail 67 is fixedly connected to the machine base 1. Multiple guide wheels 66 are provided and evenly distributed on the limiting plate 65. Multiple guide wheels 66 are provided on the upper and lower sides of the limiting guide rail 67 to further improve the stability and reliability of the adjusting plate 64 during movement. The position of the entire air flotation mechanism 3 can be adjusted by the position adjustment mechanism 6, which facilitates quick adjustment of the grinding position of the air flotation mechanism 3. Then, the swing amplitude of the air flotation mechanism 3 can be adjusted by the swing adjustment mechanism 5.

[0039] The working principle of this application is as follows: In use, the air valve to be ground is placed on the bottom side of the lower shaft core 24, and the grinding dish is fixed on the main shaft 32. The pressing mechanism 2 is activated, and the pressing cylinder 22 and the buffer cylinder 27 drive the movable frame 23 to move downward, which in turn moves the lower shaft core 24 downward, pressing the air valve tightly onto the grinding dish on the main shaft 32. At the same time, an external air source delivers gas between the lower support ring 33 and the lower ball basin 34 through the air inlet 37 on the lower support ring 33, forming an air film, causing the lower ball basin 34 to float above the lower support ring 33.

[0040] Start the rotary drive mechanism 4, the rotary drive motor 42 drives the drive pulley to rotate, and through the transmission belt 44 drives the driven pulley 45 and the main shaft 32 to rotate, which in turn drives the lower ball basin 34 and the air valve to rotate. The grinding disc rotates in a circular motion and comes into contact with the air valve to realize the grinding operation.

[0041] According to the grinding requirements of the air valve, the swing angle of the lower ball basin 34 can be adjusted by the swing adjustment mechanism 5. The swing motor 51 drives the swing shaft 52 and the swing slider 54 to move, and the fixed seat 31 and the lower ball basin 34 swing through the swing cover 53 and the eccentric swing rod 57.

[0042] The position of the entire air flotation mechanism 3 can also be adjusted by the position adjustment mechanism 6. Rotating the adjustment handwheel 61 will drive the adjustment screw 62 to rotate, so that the adjustment nut 63 and the adjustment plate 64 move under the guidance of the guide wheel 66 and the limit guide rail 67, thereby driving the swing adjustment mechanism 5 and the air flotation mechanism 3 to move, realizing the position adjustment of the air flotation mechanism 3, which facilitates the quick adjustment of the grinding position of the air flotation mechanism 3.

[0043] Wastewater generated during the grinding process is collected by a waterproof basin 35 and discharged through a drain pipe 38. A waterproof cover 36 prevents wastewater from splashing out and ensures the cleanliness of the equipment interior.

[0044] The grinding device for marine air valve orifices provided in this application, by setting a rotary drive mechanism 4 and an oscillating adjustment mechanism 5, can drive the lower ball basin 34 to achieve both rotary and oscillating motion simultaneously, so that the air valve can obtain a composite motion trajectory during the grinding process. This overcomes the defect of traditional grinding machines that can only oscillate in one direction, ensuring that all parts of the air valve can be ground evenly, and improving the surface quality and optical precision of the air valve. By providing an air inlet 37 on the lower support ring 33 and connecting to an external air source, the lower ball basin 34 can be floatingly positioned on the top side of the lower support ring 33, forming an air film between the lower ball basin 34 and the lower support ring 33. This avoids direct contact between the two, reduces frictional resistance, and makes the rotation of the lower ball basin 34 smoother, effectively increasing the rotational speed and improving the valve grinding efficiency. Because the lower ball basin 34 and the lower support ring 33 are separated by the air film, the influence of the difference in the friction coefficient of the support ring surface on the rotation of the lower ball basin 34 is eliminated, making the rotational speed of the lower ball basin 34 more stable. This ensures that the grinding force and time on the valve surface are uniform, improving the uniformity and precision of the valve grinding. The non-contact mating method between the lower ball basin 34 and the lower support ring 33 reduces wear between them, extends the service life of the equipment, reduces equipment maintenance costs and downtime, and helps improve production efficiency.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grinding device for the valve port of a marine air valve, characterized in that, The machine includes a machine base and multiple grinding stations, which are evenly arranged on the machine base. Each grinding station includes a pressing mechanism, an air flotation mechanism, and a rotary drive mechanism. The pressing mechanism and the air flotation mechanism are both located on the machine base. The air flotation mechanism is located at the bottom of the pressing mechanism. The rotary drive mechanism is located on the machine base and connected to the air flotation mechanism. The air flotation mechanism includes a fixed base, a main shaft, a lower support ring, and a lower ball basin. The main shaft is fixedly mounted on the fixed base and connected to the lower ball basin and a rotary drive mechanism. The lower support ring is mounted on the machine base and has an air inlet. The air inlet is used to connect to an external air source and allows the lower ball basin to float on the top side of the lower support ring. The rotary drive mechanism is connected to the main shaft and drives the main shaft and the lower ball basin to rotate.

2. The grinding device for the valve port of a marine air valve according to claim 1, characterized in that, The lower support ring is arranged in a ring shape, and there are four air inlets, which are evenly distributed on the side of the lower support ring.

3. A grinding device for the valve port of a marine air valve according to claim 1, characterized in that, The air flotation mechanism also includes a waterproof basin and a waterproof cover. The waterproof basin is fixedly connected to the inner side of the lower ball basin, and the waterproof cover is fixedly connected to the top side of the waterproof basin. A drain pipe is provided on the side of the lower ball basin.

4. A grinding device for the valve port of a marine air valve according to claim 3, characterized in that, The pressing mechanism includes a fixed frame, a pressing cylinder, a movable frame, a lower shaft core, a limiting frame, a buffer spring, and a buffer cylinder. The fixed frame is fixedly connected to the machine base. The pressing cylinder is fixedly connected to the fixed frame and also to the movable frame. One end of the lower shaft core is fixedly connected to the movable frame, and the other end is disposed inside the waterproof cover and positioned above the main shaft. The limiting frame is fixedly connected to the fixed frame. The buffer spring is disposed inside the limiting frame and abuts against the lower shaft core and the limiting frame, respectively. The buffer cylinder is fixedly connected to the fixed frame and also to the movable frame.

5. A grinding device for the valve port of a marine air valve according to claim 1, characterized in that, The rotary drive mechanism includes a motor plate, a rotary drive motor, a drive pulley, a transmission belt, and a driven pulley. The motor plate is fixedly connected to the machine base, the rotary drive motor is fixedly connected to the motor plate, the drive pulley is fixedly connected to the rotary drive motor, the transmission belt is fixedly wound around the drive pulley and the driven pulley, and the driven pulley is fixedly connected to the outside of the main shaft.

6. A grinding device for the valve port of a marine air valve according to claim 1, characterized in that, It also includes a swing adjustment mechanism, which is respectively disposed in the air flotation mechanism and the position adjustment mechanism; the swing adjustment mechanism includes a swing motor, a swing shaft, a swing cover, a swing slider, a swing slide rail, a swing screw, and an eccentric swing rod. The swing motor is fixedly connected to the position adjustment mechanism. One end of the swing shaft is fixedly installed in the swing motor, and the other end passes through the swing cover and is fixedly connected to the swing slider. The swing slider is movably disposed in the swing cover and slidably connected to the swing slide rail. The swing slide rail is fixedly connected to the swing cover. The swing screw is threaded to the swing slider and rotatably connected to the swing cover. One end of the eccentric swing rod is fixedly connected to the swing cover, and the other end is fixedly connected to the fixed base.

7. A grinding device for the valve port of a marine air valve according to claim 1, characterized in that, It also includes a position adjustment mechanism, which is respectively disposed on the machine base and the swing adjustment mechanism; the position adjustment mechanism includes an adjustment handwheel, an adjustment screw, an adjustment nut, an adjustment plate, a limit plate, a guide wheel and a limit guide rail, the adjustment handwheel is fixedly connected to the adjustment screw, the adjustment nut is threadedly connected to the adjustment screw and fixedly connected to the adjustment plate, the limit plate is fixedly connected to the side of the adjustment plate, the guide wheel is rotatably connected to the limit plate and slidably connected to the limit guide rail, and the limit guide rail is fixedly connected to the machine base.

8. A grinding device for the valve port of a marine air valve according to claim 7, characterized in that, Multiple guide wheels are provided and are evenly distributed on the limiting plate. The multiple guide wheels are provided on the upper and lower sides of the limiting guide rail.

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