Air cushion buffer type multi-stage pneumatic lifting system

Abstract

This invention relates to the field of underwater lifting device technology, and provides an air-cushioned, multi-stage pneumatic lifting system. The system includes a lifting device and a pneumatic circuit. The lifting device includes a base and three lifting rods—a first-stage, a second-stage, and a third-stage lifting rod—coaxially arranged inside the base and capable of extending upwards in stages. The lifting device forms a first retraction chamber, a second retraction chamber, and a third retraction chamber from the outside in. A first connector penetrating the base is provided at the upper part of the base, and the bottom of the base is fixedly connected to a bottom cover. A second connector penetrating the bottom cover is provided on the bottom cover. The top of the third-stage lifting rod is fixedly connected to a plug. According to this embodiment, the air-cushioned, multi-stage pneumatic lifting system can more precisely control the complete and smooth extension and retraction of each stage of the lifting rod, improving the airtightness of the lifting system.

Description

Technical Field

[0001] This invention relates to the field of underwater lifting device technology, and in particular to an air cushion buffer type multi-stage pneumatic lifting system. Background Technology

[0002] Currently, underwater small antenna lifting mechanisms mainly include positive pressure driven antenna lifting mechanisms and return vacuum driven antenna lifting mechanisms. In practical applications, both positive pressure driven and return vacuum driven antenna lifting mechanisms have the following shortcomings: 1. The extension and retraction speeds of each stage of the lifting rod are completely uncontrollable; 2. A large impact is generated at the end of the mechanism during operation, adversely affecting the normal operation and safe service of the antenna lifting mechanism; 3. During mechanism operation, the kinematic pairs must both move relative to each other and provide guiding and positioning support, resulting in a complex structure, high manufacturing difficulty and cost, and the sealing surfaces of the kinematic pairs are easily scratched during operation, affecting the overall sealing and safety of the mechanism; 4. Positive pressure driven antenna lifting mechanisms are unsuitable for underwater operations, as water can enter the mechanism and then the pneumatic circuit, affecting the normal operation of the pneumatic circuit.

[0003] Therefore, how to provide a buffer-type lifting mechanism suitable for underwater operations has become an urgent technical problem to be solved. Summary of the Invention

[0004] In view of this, in order to overcome the shortcomings of the prior art, the present invention aims to provide an air cushion buffer type multi-stage pneumatic lifting system.

[0005] This invention provides an air cushion buffer type multi-stage pneumatic lifting system. The system includes a lifting device and a pneumatic circuit connected to the lifting device. The lifting device includes a base and a first-stage lifting rod, a second-stage lifting rod, and a third-stage lifting rod, which are coaxially arranged inside the base from the outside to the inside and can be progressively extended upwards from the base. A first gas channel is provided on one side of the first-stage lifting rod, axially distributed and connecting the inner cavity of the first-stage lifting rod to the outer wall. A second gas channel is provided on one side of the second-stage lifting rod, axially distributed and connecting the inner cavity of the second-stage lifting rod to the outer wall. The upper parts of the base, the first-stage lifting rod, and the second-stage lifting rod protrude inwards, and the bottoms of the first-stage lifting rod, the second-stage lifting rod, and the third-stage lifting rod protrude outwards, forming a first retraction cavity, a second retraction cavity, and a third retraction cavity from the outside to the inside. A first connector penetrating the base is provided on the upper part of the base, the bottom of the base is fixedly connected to a bottom cover, a second connector penetrating the bottom cover is provided on the bottom cover, and the top of the third-stage lifting rod is fixedly connected to a plug.

[0006] Preferably, in the air cushion buffer multi-stage pneumatic lifting system of the present invention, the upper part of the base is provided with an inwardly protruding base top protrusion, and a base guide support ring is coaxially arranged on the inner side of the upper part of the base top protrusion. The base guide support ring is fixed by a clamping screw ring coaxially arranged on the inner side of the base top.

[0007] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the upper part of the first-stage lifting rod is provided with a first-stage lifting rod upper protrusion, the upper part of the first-stage lifting rod upper protrusion is integrally connected to the first-stage lifting rod limiting section, the inner side of the first-stage lifting rod limiting section is coaxially provided with a first-stage lifting rod guide support ring, and the outer side of the first-stage lifting rod limiting section is coaxially provided with a first-stage positioning plate for limiting.

[0008] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the first-stage positioning plate is composed of an integrally connected first-stage positioning plate transverse part, a first-stage positioning plate longitudinal part, and a first-stage positioning plate inward folded longitudinal part. The first-stage positioning plate transverse part extends radially inward to fix the first-stage lifting rod guide support ring, the first-stage positioning plate longitudinal part extends radially outward, and the first-stage positioning plate inward folds radially inward and is threadedly connected to the outer side of the first-stage lifting rod limiting section.

[0009] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, a lower protrusion of the first-stage lifting rod is provided at the bottom of the first-stage lifting rod, a first-stage support assembly groove is provided on the lower protrusion of the first-stage lifting rod, and a first-stage piston guide support ring is provided in the first-stage support assembly groove.

[0010] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the first gas channel is composed of a first lower transverse channel, a first vertical gas channel and a first upper transverse channel that are integrally connected. The first lower transverse channel is located above the lower protrusion of the first-stage lifting rod, the first vertical gas channel is axially located inside the rod wall of the first-stage lifting rod, and the first upper transverse channel is located below the upper protrusion of the first-stage lifting rod.

[0011] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the upper part of the secondary lifting rod is provided with an upper protrusion of the secondary lifting rod, the upper part of the upper protrusion of the secondary lifting rod is integrally connected with a limiting section of the secondary lifting rod, a guide support ring of the secondary lifting rod is coaxially provided on the inner side of the limiting section of the secondary lifting rod, a secondary positioning plate for limiting is coaxially provided on the outer side of the limiting section of the secondary lifting rod, a lower protrusion of the secondary lifting rod is provided at the bottom of the secondary lifting rod, a secondary support assembly groove is provided on the lower protrusion of the secondary lifting rod, and a secondary piston guide support ring is provided in the secondary support assembly groove.

[0012] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the bottom of the three-stage lifting rod is provided with a lower protrusion of the three-stage lifting rod, and a three-stage support assembly groove is provided on the lower protrusion of the three-stage lifting rod, and a three-stage piston guide support ring is provided in the three-stage support assembly groove.

[0013] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the lower part of the plug matches the inner cavity of the three-stage lifting rod, the outer diameter of the upper part of the plug is larger than the outer diameter of the three-stage lifting rod, one end of the positioning detector is fixed to the bottom of the bottom cover, and the other end of the positioning detector passes through the bottom cover from bottom to top and is set in the inner cavity of the base.

[0014] Preferably, in the air cushion buffer type multi-stage pneumatic lifting system of the present invention, the pneumatic circuit includes an air pump, an overflow valve, a retraction chamber circuit disposed between the overflow valve and the first connector of the lifting mechanism, and an extension chamber circuit disposed between the overflow valve and the second connector of the lifting mechanism. The retraction chamber circuit includes a retraction chamber air path and a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, an air tank, and a fifth solenoid valve disposed sequentially on the retraction chamber air path. The extension chamber circuit includes an extension chamber air path and a sixth solenoid valve, a seventh solenoid valve, an eighth solenoid valve, a ninth solenoid valve, and a tenth solenoid valve disposed sequentially on the extension chamber air path.

[0015] The air cushion buffer multi-stage pneumatic lifting system of the present invention, through comprehensive structural design, has the following beneficial effects:

[0016] 1. Achieve independence and sealing of the retraction chamber circuit and extension chamber circuit in the lifting device, thereby improving the airtightness of the lifting device during underwater operations;

[0017] 2. To achieve more precise control over the complete and smooth extension and retraction of each level of the lifting boom;

[0018] 3. Avoid insufficient sealing surfaces of moving parts in the lifting device, ensure synchronous airtightness between the lifting device and the installed platform, and prevent water from entering the interior of the installed platform. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments 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.

[0020] Figure 1 This is a schematic diagram of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment;

[0021] Figure 2This is a partial structural diagram of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the first-stage lifting rod of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment;

[0023] Figure 4 This is another partial structural schematic diagram of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment;

[0024] Figure 5 This is a schematic diagram of the lifting device in the deployed state of the air cushion buffer multi-stage pneumatic lifting system of this embodiment;

[0025] Figure 6 This is a schematic diagram of the structure of the air cushion buffer multi-stage pneumatic lifting system in this embodiment;

[0026] Figure 7 This is an example diagram illustrating the operating principle of the air cushion buffer multi-stage pneumatic lifting system in this embodiment;

[0027] Figure 8 This is a schematic diagram of a 2-position 3-way solenoid valve.

[0028] In the diagram, 01-base, 02-first-stage lifting rod, 03-second-stage lifting rod, 04-third-stage lifting rod, 05-bottom cover, 06-plug, 011-first connector, 012-top protrusion of the base, 013-base guide support ring, 014-compression screw ring, 021-first gas channel, 022-first retraction chamber, 023-limiting section of the first-stage lifting rod, 024-guide support ring of the first-stage lifting rod, 025-first-stage positioning plate, 026-lower protrusion of the first-stage lifting rod, 0 27-First-stage support assembly slot, 028-Upper protrusion of first-stage lifting rod, 029-First-stage piston guide support ring, 031-Second gas passage, 032-Second retraction chamber, 033-Second-stage lifting rod limiting section, 034-Second-stage lifting rod guide support ring, 035-Second-stage positioning plate, 036-Lower protrusion of second-stage lifting rod, 037-Second-stage support assembly slot, 038-Upper protrusion of second-stage lifting rod, 039-Second-stage piston guide support ring, 041-Third retraction chamber, 0 42-Lower protrusion of the third-stage lifting rod; 043-Third-stage support assembly groove; 044-Third-stage piston guide support ring; 051-Second connector; 052-Position detector; 0211-First lower transverse channel; 0212-First vertical gas channel; 0213-First upper transverse channel; 0251-Transverse part of the first-stage positioning plate; 0252-Vertical part of the first-stage positioning plate; 0253-Vertical part of the inward fold of the first-stage positioning plate; 07-Pneumatic circuit; 071-Air pump; 072- Overflow valve, 073-Return chamber circuit, 074-Extend chamber circuit, 0731-Return chamber air path, 0732-First solenoid valve, 0733-Second solenoid valve, 0734-Third solenoid valve, 0735-Fourth solenoid valve, 0736-Air tank, 0737-Fifth solenoid valve, 0741-Extend chamber air path, 0742-Sixth solenoid valve, 0743-Seventh solenoid valve, 0744-Eighth solenoid valve, 0745-Ninth solenoid valve, 0746-Tenth solenoid valve. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the following embodiments and features can be combined with each other; and, based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0032] Figure 1 This is a schematic diagram of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment, as shown below. Figure 1 As shown, the air cushion buffer multi-stage pneumatic lifting system of this embodiment includes a lifting device and a pneumatic circuit 07 connected to the lifting device. The lifting device includes a base 01 and a first-stage lifting rod 02, a second-stage lifting rod 03, and a third-stage lifting rod 04, which are coaxially arranged inside the base 01 from the outside to the inside and can be progressively extended upwards from the base. A first gas channel 021 is provided on one side of the first-stage lifting rod 02, axially distributed and connecting the inner cavity of the first-stage lifting rod 02 to the outer wall. A second-stage lifting rod 03 is provided on one side of the second-stage lifting rod 03, axially distributed and connecting the inner cavity of the second-stage lifting rod 03 to the outer wall. The second gas channel 031 of the wall, the upper parts of the base 01, the first-stage lifting rod 02 and the second-stage lifting rod 03 protrude inward respectively, and the bottoms of the first-stage lifting rod 02, the second-stage lifting rod 03 and the third-stage lifting rod 04 protrude outward respectively, forming the first retraction cavity 022, the second retraction cavity 032 and the third retraction cavity 041 in sequence from the outside to the inside. The upper part of the base 01 is provided with a first connector 011 that penetrates the base 01. The bottom of the base 01 is fixedly connected to the bottom cover 05. The bottom cover 05 is provided with a second connector 051 that penetrates the bottom cover 05. The top of the third-stage lifting rod 04 is fixedly connected to the plug 06.

[0033] Figure 2 This is a partial structural diagram of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment, as shown below. Figure 2 and Figure 1 As shown, in the air cushion buffer type multi-stage pneumatic lifting device of this embodiment, the upper part of the base 01 is provided with a base top protrusion 012 that protrudes inward, and the upper inner side of the base top protrusion 012 is coaxially provided with a base guide support ring 013. The base guide support ring 013 is fixed by a clamping screw ring 014 coaxially provided on the inner side of the top of the base 01.

[0034] Figure 3This is a schematic diagram of the structure of the first-stage lifting rod of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment, as shown below. Figure 3 , Figure 1 and Figure 2 As shown, in this embodiment, the upper part of the first-stage lifting rod 02 is provided with an upper protrusion 028. An integrally connected upper limit section 023 is provided on the upper part of the upper protrusion 028. A guide support ring 024 is coaxially provided on the inner side of the limit section 023, and a first-stage positioning plate 025 for limiting is coaxially provided on the outer side of the limit section 023. A lower protrusion 026 is provided at the bottom of the first-stage lifting rod 02. A first-stage support assembly groove 027 is provided on the lower protrusion 026, and a first-stage piston guide support ring 029 is provided within the first-stage support assembly groove 027. The first gas passage 021 is composed of a first lower transverse passage 0211, a first vertical gas passage 0212, and a first upper transverse passage 0213 that are integrally connected. The first lower transverse passage 0211 is located above the lower protrusion 26 of the first-stage lifting rod, the first vertical gas passage 0212 is axially located inside the rod wall of the first-stage lifting rod 02, and the first upper transverse passage 0213 is located below the upper protrusion 028 of the first-stage lifting rod.

[0035] Figure 4 This is another partial structural diagram of the lifting device in the air cushion buffer multi-stage pneumatic lifting system of this embodiment, as shown below. Figure 4 As shown, in this embodiment of the air cushion buffer type multi-stage pneumatic lifting device, the first-stage positioning plate 025 is composed of an integrally connected first-stage positioning plate transverse part 0251, a first-stage positioning plate longitudinal part 0252, and a first-stage positioning plate inward folded longitudinal part 0253. The first-stage positioning plate transverse part 0251 extends radially inward to fix the first-stage lifting rod guide support ring 024, the first-stage positioning plate longitudinal part 0252 extends radially outward, and the first-stage positioning plate inward folded longitudinal part 0253 bends radially inward and is threadedly connected to the outer side of the first-stage lifting rod limiting section 023.

[0036] Figure 5 This is a schematic diagram of the deployed state of the air cushion buffer multi-stage pneumatic lifting system in this embodiment, as shown below. Figure 5As shown, in this embodiment of the air cushion buffer type multi-stage pneumatic lifting device, the upper part of the secondary lifting rod 03 is provided with a secondary lifting rod upper protrusion 038, and the upper part of the secondary lifting rod upper protrusion 038 is integrally connected with a secondary lifting rod limiting section 033. A secondary lifting rod guide support ring 034 is coaxially provided on the inner side of the secondary lifting rod limiting section 033, and a secondary positioning plate 035 for limiting is coaxially provided on the outer side of the secondary lifting rod limiting section 034. The bottom of the secondary lifting rod 03 is provided with a secondary lifting rod lower protrusion 036, and a secondary support assembly groove 037 is provided on the secondary lifting rod lower protrusion 036. A secondary piston guide support ring 039 is provided in the secondary support assembly groove 037. The bottom of the tertiary lifting rod 04 is provided with a tertiary lifting rod lower protrusion 042, and a tertiary support assembly groove 043 is provided on the tertiary lifting rod lower protrusion 042. A tertiary piston guide support ring 044 is provided in the tertiary support assembly groove 043. The lower part of the plug 06 matches the inner cavity of the three-stage lifting rod 04, and the outer diameter of the upper part of the plug 06 is larger than the outer diameter of the three-stage lifting rod 04.

[0037] In practical applications, in the lifting device of this embodiment, the first-stage lifting rod 02 and the second-stage lifting rod 03 form a piston seal and a piston rod seal. The gap between the metal holes of these two seals is approximately 0.5mm. A tight-fitting guide support is formed by the first-stage lifting rod guide support ring 024 and the third-stage piston guide support ring 044. The first-stage lifting rod guide support ring 024, the first-stage piston guide support ring 029, the second-stage lifting rod guide support ring 034, the second-stage piston guide support ring 039, and the third-stage piston guide support ring 044 are made of wear-resistant materials, so they will not scratch the surface of the moving pair, and at the same time, they will increase the static and dynamic stability of the moving pair.

[0038] like Figure 1 and Figure 5 As shown, in the air cushion buffer type multi-stage pneumatic lifting system of this embodiment, one end of the position detector 052 is fixed to the bottom of the bottom cover 05, and the other end of the position detector 052 passes through the bottom cover 05 from bottom to top and is set in the inner cavity of the base 01.

[0039] Figure 6 This is a schematic diagram of the structure of the air cushion buffer multi-stage pneumatic lifting system in this embodiment. Figure 6As shown, the pneumatic circuit 07 in the air cushion buffer multi-stage pneumatic lifting system of this embodiment includes an air pump 071, an overflow valve 072, a retraction chamber circuit 073 disposed between the overflow valve 072 and the first connector 011 of the lifting mechanism, and an extension chamber circuit 074 disposed between the overflow valve 072 and the second connector 051 of the lifting mechanism. The retraction chamber circuit 073 includes a retraction chamber air passage 0731 and a first solenoid valve 0732, a second solenoid valve 0733, a third solenoid valve 0734, a fourth solenoid valve 0735, an air tank 0736, and a fifth solenoid valve 0737 sequentially disposed on the retraction chamber air passage 0731. The extension chamber circuit 074 includes an extension chamber air passage 0741 and a sixth solenoid valve 0742, a seventh solenoid valve 0743, an eighth solenoid valve 0744, a ninth solenoid valve 0745, and a tenth solenoid valve 0746 sequentially disposed on the extension chamber air passage 0741. Figure 6 As shown, the first solenoid valve 0732 of the retraction chamber circuit 073 is connected to the overflow valve 072, and the fifth solenoid valve 0737 of the retraction chamber circuit 073 is connected to the first connector 011 of the lifting mechanism; the sixth solenoid valve 0742 of the extension chamber circuit 074 is connected to the overflow valve 072, and the tenth solenoid valve 0746 of the extension chamber circuit 074 is connected to the second connector 051 of the lifting mechanism.

[0040] Air pump 071 provides driving pressure. To ensure the effectiveness of exhaust throttling, an air tank 0736 is connected in series at the end of the retraction chamber circuit 073. At the same time, three parallel exhaust bypasses are set on both the extension chamber circuit 074 and the retraction chamber circuit 073 to more accurately control the extension and retraction of the first-stage lifting rod 02, the second-stage lifting rod 03, and the third-stage lifting rod 04, achieving a relatively smooth effect and avoiding impact.

[0041] The application principle of the air cushion buffer multi-stage pneumatic lifting system in this embodiment is as follows:

[0042] Because a first gas channel 021 is provided on the first-stage lifting rod 02 and a second gas channel 031 is provided on the second-stage lifting rod 03, the first retraction chamber 022, the second retraction chamber 032 and the third retraction chamber 041 are independent of each other, and the gas can be completely sealed.

[0043] Extension phase of the lifting mechanism: Start the air pump 071, simultaneously energizing the first solenoid valve 0732 and the fifth solenoid valve 0737, opening the retraction chamber circuit 073, and sending gas to the first retraction chamber 022, the second retraction chamber 032, the third retraction chamber 041, and the air tank 0736. When gas overflows, de-energize the first solenoid valve 0732 to maintain gas in the retraction chamber air passage 0731. Simultaneously, energize the sixth solenoid valve 0742 and the tenth solenoid valve 0746, opening the extension chamber circuit 074. After a certain amount of gas is filled into the extension chamber 015, energize the second solenoid valve 0733 on the retraction chamber circuit 073, and adjust the second solenoid valve 073. 3. Exhaust air from the second air port, causing the first-stage lifting rod 02 to extend smoothly (the power and back pressure on the first-stage lifting rod 02 are equal). Then, de-energize the second solenoid valve 0733 and simultaneously energize the third solenoid valve 0734. Adjust the exhaust air from the second air port of the third solenoid valve 0734, causing the second-stage lifting rod 03 to extend smoothly (the power and back pressure on the second-stage lifting rod 03 are equal). Then, de-energize the third solenoid valve 0734 and simultaneously energize the fourth solenoid valve 0735. Adjust the exhaust air from the second air port of the fourth solenoid valve 0735, causing the third-stage lifting rod 04 to extend smoothly (the power and back pressure on the third-stage lifting rod 04 are equal). Then, de-energize the fourth solenoid valve 0735. Figure 7 This diagram illustrates the operating principle of the air-cushioned multi-stage pneumatic lifting system in this embodiment. The extended state of the lifting mechanism in this air-cushioned multi-stage pneumatic lifting system can be seen in [reference needed]. Figure 7 .

[0044] Lifting mechanism retraction stage: Start pump 071, simultaneously energize the sixth solenoid valve 0742 and the tenth solenoid valve 0746, open the extension chamber circuit 074, and send gas to the extension chamber 015. After the gas overflows, de-energize the sixth solenoid valve 0742, and simultaneously energize the first solenoid valve 0732 and the fifth solenoid valve 0737. Open the retraction chamber circuit 073, and send gas to the first retraction chamber 022, the second retraction chamber 032, the third retraction chamber 041, and the gas tank 0736. After filling with a certain amount of gas, energize the seventh solenoid valve 0743 on the extension chamber circuit 074, and adjust the second air port of the seventh solenoid valve 0743 to exhaust gas, so that the three-stage lifting rod 04 retracts smoothly (three After the power and back pressure on the first-stage lifting rod 04 are equal, the seventh solenoid valve 0743 is de-energized, and the eighth solenoid valve 0744 is energized. Adjusting the second air port of the eighth solenoid valve 0744 to exhaust air causes the second-stage lifting rod 03 to retract smoothly (after the power and back pressure on the second-stage lifting rod 03 are equal), the eighth solenoid valve 0744 is de-energized, and the ninth solenoid valve 0745 is energized. Adjusting the second air port of the ninth solenoid valve 0745 to exhaust air causes the first-stage lifting rod 02 to retract smoothly (after the power and back pressure on the first-stage lifting rod 02 are equal), the ninth solenoid valve 0745 is de-energized. All energizers are de-energized when the lower end of the third-stage lifting rod 04 is detected to be in contact with the positioning detector 052. The retraction state of the lifting mechanism in this embodiment's air cushion buffer multi-stage pneumatic lifting system can be found in [reference needed]. Figure 6 .

[0045] It should be noted that the solenoid valve used in this embodiment is a 2-position 3-way solenoid valve. Figure 8 This is a schematic diagram of a 2-position 3-way solenoid valve, as shown below. Figure 8 As shown, the valve core has two positions (upper and lower positions as shown) and three air ports (ports 1, 2, and 3). When powered on, the valve core is in the lower position, with ports 1 and 2 connected, while port 3 is not connected to ports 1 and 2. When powered off, the spring returns to its original position, the valve core is in the upper position, with ports 2 and 3 connected, while port 1 is not connected to ports 2 and 3. To more precisely regulate airflow using the solenoid valves, as an optional example, this embodiment can also install exhaust throttle valves on the second air port of the first solenoid valve 0732, second solenoid valve 0733, third solenoid valve 0734, fourth solenoid valve 0735, fifth solenoid valve 0737, sixth solenoid valve 0742, seventh solenoid valve 0743, eighth solenoid valve 0744, ninth solenoid valve 0745, and tenth solenoid valve 0746. Adjusting the tightness of the screws on these valves regulates the exhaust flow rate, thereby achieving speed control.

[0046] The air pump used in this embodiment is a 071-position double-acting air pump, which can evacuate a vacuum or output positive pressure. Those skilled in the art can also select other suitable air pumps according to the specific needs of the scenario, and this embodiment does not limit this.

[0047] The overflow valve 072 used in this embodiment is used to protect the system safety. When the pressure value of the gas path is greater than the set value of the overflow valve 072, the excess gas can be discharged from the overflow valve 072.

[0048] During the navigation of the application platform (not shown), the fifth solenoid valve 0737 and the tenth solenoid valve 0746 are always energized, and their first and second air ports are connected. The first solenoid valve 0732, the second solenoid valve 0733, the third solenoid valve 0734, the fourth solenoid valve 0735, the sixth solenoid valve 0742, the seventh solenoid valve 0743, the eighth solenoid valve 0744, and the ninth solenoid valve 0745 are de-energized, and their first air ports are not connected to their second and third air ports. Therefore, even if water enters the air cushion buffer multi-stage pneumatic lifting system, it can ensure that water enters the interior of the application platform.

[0049] The air cushion buffer type multi-stage pneumatic lifting system is equipped with an airtight application platform. When the fifth solenoid valve 0737 and the tenth solenoid valve 0746 are de-energized, their second and third air ports are connected. The airtight gas of the application platform enters the extension chamber 015, the first retraction chamber 022, the second retraction chamber 032 and the third retraction chamber 041 of the lifting device through the third air port, thus achieving synchronous airtightness.

[0050] It should be noted that, in order to further improve the airtightness and accuracy of the multi-stage pneumatic lifting system with air cushion buffer in this embodiment, suitable sealing rings and lubricants can also be installed at corresponding positions between the base 01, the first-stage lifting rod 02, the second-stage lifting rod 03 and the third-stage lifting rod 03.

[0051] The air cushion buffer multi-stage pneumatic lifting system of the present invention, through comprehensive structural design, has the following beneficial effects:

[0052] 1. Achieve independence and sealing of the retraction chamber circuit and extension chamber circuit in the lifting device, thereby improving the airtightness of the lifting device during underwater operations;

[0053] 2. To achieve more precise control over the complete and smooth extension and retraction of each level of the lifting boom;

[0054] 3. Avoid insufficient sealing surfaces of moving parts in the lifting device, ensure synchronous airtightness between the lifting device and the installed platform, and prevent water from entering the interior of the installed platform.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-stage pneumatic lifting system with air cushion cushioning, characterized in that, The system includes a lifting device and a pneumatic circuit connected to the lifting device. The lifting device includes a base and three lifting rods—a first-stage lifting rod, a second-stage lifting rod, and a third-stage lifting rod—that are coaxially arranged inside the base and can expand upwards from the base. A first gas channel is provided on one side of the first-stage lifting rod, axially distributed and connecting the inner cavity of the first-stage lifting rod to its outer wall. A second gas channel is provided on one side of the second-stage lifting rod, axially distributed and connecting the inner cavity of the second-stage lifting rod to its outer wall. The upper parts of the base, the first-stage lifting rod, and the second-stage lifting rod protrude inwards, and the bottoms of the first-stage lifting rod, the second-stage lifting rod, and the third-stage lifting rod protrude outwards, forming a first retraction chamber, a second retraction chamber, and a third retraction chamber sequentially from the outside in. The upper part of the base is provided with a first connector that passes through the base, the bottom of the base is fixedly connected to the bottom cover, the bottom cover is provided with a second connector that passes through the bottom cover, and the top of the three-stage lifting rod is fixedly connected to the plug; the pneumatic circuit includes an air pump, an overflow valve, a retraction chamber circuit provided between the overflow valve and the first connector of the lifting mechanism, and an extension chamber circuit provided between the overflow valve and the second connector of the lifting mechanism. The retraction chamber circuit includes a retraction chamber air passage and a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, an air tank, and a fifth solenoid valve arranged sequentially on the retraction chamber air passage. The extension chamber circuit includes an extension chamber air passage and a sixth solenoid valve, a seventh solenoid valve, an eighth solenoid valve, a ninth solenoid valve, and a tenth solenoid valve arranged sequentially on the extension chamber air passage.

2. The air cushion buffer type multi-stage pneumatic lifting system according to claim 1, characterized in that, The upper part of the base is provided with an inwardly protruding base top protrusion, and a base guide support ring is coaxially arranged on the inner side of the upper part of the base top protrusion. The base guide support ring is fixed by a clamping screw ring coaxially arranged on the inner side of the base top.

3. The air cushion buffer type multi-stage pneumatic lifting system according to claim 2, characterized in that, The upper part of the first-stage lifting rod is provided with an upper protrusion of the first-stage lifting rod, and the upper part of the upper protrusion of the first-stage lifting rod is integrally connected to the limiting section of the first-stage lifting rod. The inner side of the limiting section of the first-stage lifting rod is coaxially provided with a guide support ring of the first-stage lifting rod, and the outer side of the limiting section of the first-stage lifting rod is coaxially provided with a first-stage positioning plate for limiting.

4. The air cushion buffer type multi-stage pneumatic lifting system according to claim 3, characterized in that, The primary positioning plate consists of an integrally connected primary positioning plate transverse section, a primary positioning plate longitudinal section, and a primary positioning plate inner folded longitudinal section. The primary positioning plate transverse section extends radially inward to fix the primary lifting rod guide support ring, the primary positioning plate longitudinal section extends radially outward, and the primary positioning plate inner folded longitudinal section bends radially inward and is threadedly connected to the outer side of the primary lifting rod limiting section.

5. The air cushion buffer type multi-stage pneumatic lifting system according to claim 4, characterized in that, The bottom of the primary lifting rod is provided with a lower protrusion of the primary lifting rod, and a primary support assembly groove is provided on the lower protrusion of the primary lifting rod. A primary piston guide support ring is provided in the primary support assembly groove.

6. The air cushion buffer type multi-stage pneumatic lifting system according to claim 5, characterized in that, The first gas passage consists of a first lower transverse passage, a first vertical gas passage, and a first upper transverse passage that are integrally connected. The first lower transverse passage is located above the lower protrusion of the first-stage lifting rod, the first vertical gas passage is axially located inside the rod wall of the first-stage lifting rod, and the first upper transverse passage is located below the upper protrusion of the first-stage lifting rod.

7. The air cushion buffer type multi-stage pneumatic lifting system according to claim 6, characterized in that, The upper part of the secondary lifting rod is provided with an upper protrusion, and the upper part of the upper protrusion is integrally connected to a limiting section. A guide support ring for the secondary lifting rod is coaxially provided on the inner side of the limiting section, and a secondary positioning plate for limiting is coaxially provided on the outer side of the limiting section. The bottom of the secondary lifting rod is provided with a lower protrusion, and a secondary support assembly groove is provided on the lower protrusion. A secondary piston guide support ring is provided in the secondary support assembly groove.

8. The air cushion buffer type multi-stage pneumatic lifting system according to claim 1, characterized in that, The bottom of the three-stage lifting rod is provided with a lower protrusion of the three-stage lifting rod, and a three-stage support assembly groove is provided on the lower protrusion of the three-stage lifting rod. A three-stage piston guide support ring is provided in the three-stage support assembly groove.

9. The air cushion buffer type multi-stage pneumatic lifting system according to claim 1, characterized in that, The lower part of the plug matches the inner cavity of the three-stage lifting rod, and the outer diameter of the upper part of the plug is larger than the outer diameter of the three-stage lifting rod. One end of the positioning detector is fixed to the bottom of the bottom cover, and the other end of the positioning detector runs from bottom to top through the bottom cover and is set in the inner cavity of the base.

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