Underwater hydraulic decap mechanism

Abstract

This invention discloses an underwater hydraulic cap-opening mechanism, comprising a hydraulic cylinder body, a push rod, a limiting ring, piston I, a sealing ring, a dustproof ring, hydraulic oil, piston II, an air intake device, and an end cap. The hydraulic cylinder body is open, with a guide groove inside one end, along which the push rod slides. The outer end face of the push rod is fixed to the end cap to be opened. One end of piston I abuts against the inner end face of the push rod, while the other end is limited by an annular boss on the inner wall of the cylinder. A sealing ring and a dustproof ring are provided between piston I and the hydraulic cylinder body. After piston I moves into position, it is limited by the limiting ring on the inner wall of the cylinder. The two ends of piston II have different cross-sectional areas, and hydraulic oil is filled between the small end of piston II and the other end of piston I. The large end of piston II faces outward and is sealed with a sealing ring between it and the inner wall of the cylinder. After piston II moves into position, its large end is limited by the annular boss. The other end of the cylinder body is closed by the end cap, which is equipped with an air intake device. This invention has a large thrust, and different thrusts and strokes can be designed according to the relationship between stroke and thrust.

Description

Technical Field

[0001] This invention relates to the field of underwater unmanned equipment technology, specifically to an underwater hydraulic opening mechanism. Background Technology

[0002] Currently, there are many underwater opening mechanisms, but fewer underwater opening mechanisms. Underwater opening mechanisms include explosive bolts, thrusters, and gas generators.

[0003] Conventional lid opening mechanisms, such as Figure 1 As shown, it mainly consists of an airbag, a shell, an end cap, and a seal. The shell, end cap, and seal completely seal the airbag within its internal cavity. During use, the end cap must be opened, and the airbag must be completely released from the shell. In use, an air source inflates the airbag. To prevent overinflation and rupture, a pressure limiting valve is installed on the airbag surface. When the pressure difference between the inside and outside of the airbag reaches a certain value, the pressure limiting valve opens to release air, ensuring that the pressure difference remains within a certain range. During airbag inflation, the expansion of the airbag pushes open the end cap, and the airbag further inflates and expands, being expelled from the cavity to complete the entire process. Figure 2 As shown.

[0004] The chamber housing the airbag is a sealed cavity. When used underwater, the external water pressure exerted on the end cap is enormous. Assuming the cross-sectional area of ​​the end cap is S1 and the cross-sectional area of ​​the piston is S2, and the cross-sectional area of ​​the piston is relatively small compared to the end cap, it can be deduced from the relationship between pressure and force that the air source pressure driving the piston must be equal to the external water pressure. It takes several times the effort to push the end cap open. Furthermore, if there is mud or other obstructions on the outside of the end cap, opening it becomes even more difficult. Summary of the Invention

[0005] In view of this, the present invention provides an underwater hydraulic opening mechanism with large thrust, and different thrust and stroke can be designed according to the relationship between stroke and thrust.

[0006] The technical solution adopted in this invention is as follows:

[0007] A hydraulic underwater cover opening mechanism includes a hydraulic cylinder body, a push rod, a limit ring, piston I, a sealing ring, a dustproof ring, hydraulic oil, piston II, an air intake device, and a hydraulic cylinder end cap;

[0008] The hydraulic cylinder body is open, with a guide groove inside one end, along which the push rod slides. The outer end face of the push rod is used to fix the end cover to be opened. One end of piston I abuts against the inner end face of the push rod, and the other end of piston I is limited by an annular boss on the inner wall of the hydraulic cylinder body. A sealing ring and a dustproof ring are provided between piston I and the inner wall of the hydraulic cylinder body, with the dustproof ring closer to the push rod than the sealing ring. After piston I moves into position, it is limited by a limiting ring on the inner wall of the hydraulic cylinder body. The two ends of piston II have different cross-sectional areas, and hydraulic oil is filled between the small end of piston II and the other end of piston I. The large end of piston II faces outward and is sealed with a sealing ring between it and the inner wall of the hydraulic cylinder body. After piston II moves into position, its large end is limited by an annular boss on the inner wall of the hydraulic cylinder body. The other end of the hydraulic cylinder body is closed by a hydraulic cylinder end cover, which is equipped with an air intake device to provide power for driving piston II to move.

[0009] Furthermore, the piston I is provided with an oil injection hole in the middle, and hydraulic oil is injected and sealed by an oil seal screw.

[0010] Furthermore, the inner diameter of the guide groove is larger than the diameter of the large end of piston II.

[0011] Furthermore, the limiting ring is threadedly connected to the inner wall of the hydraulic cylinder.

[0012] Furthermore, the end face of the push rod that mates with piston I is provided with a protrusion; piston I is a stepped shaft, with the large-diameter section fitting with the inner wall of the pneumatic cylinder, and the small-diameter section being hollow inside, the hollow part being engaged with the outer periphery of the protrusion.

[0013] Furthermore, the push rod is a three-jaw push rod.

[0014] Furthermore, the push rod is a cylinder with one end open and facing outwards.

[0015] Furthermore, the hydraulic opening mechanism also includes a housing, an air bladder, and a sealing element; one end of the housing is open for sealing connection with the end cover to be opened through the sealing element, and the other end of the housing has a through hole in the middle for installing the pneumatic cylinder end cover; the cylinder body of the pneumatic cylinder is located in the middle of the housing and is integrated with the housing structure; the air bladder is set in the housing and is used to inflate and release after the end cover to be opened is fully opened, driving the mechanism to float upward.

[0016] Furthermore, there are two airbags, symmetrically arranged inside the shell.

[0017] Beneficial effects:

[0018] 1. This invention uses hydraulic oil for force conversion, which amplifies the force and shortens the piston stroke. It can provide greater thrust within the limited space of the hydraulic cylinder body, and can cope with problems such as high underwater back pressure and silt on the outside of the end cap, ensuring that the cap can be opened smoothly. Secondly, this invention avoids the use of pyrotechnics, thus improving safety.

[0019] 2. The inner diameter of the guide groove of the present invention is larger than the diameter of the large end of piston II, so that the end cover to be opened is subjected to more uniform force and the opening of the cover is more stable.

[0020] 3. The end face of the push rod that connects with piston I is provided with a protrusion, and piston I is engaged with the outer periphery of the protrusion, making the connection between the two more reliable.

[0021] 4. The present invention also includes an airbag, which is inflated and released after the end cap is fully opened, causing the mechanism to float up to assist in recovery or serve as a beacon.

[0022] 5. This invention can design different thrust and stroke according to the relationship between stroke and thrust. By designing different force-bearing cross-sectional areas of piston I and small end cross-sectional areas of piston II, the purpose of adjusting thrust and stroke can be achieved. Attached Figure Description

[0023] Figure 1 It is a conventional airbag opening mechanism.

[0024] Figure 2 This is a schematic diagram of the standard airbag opening process.

[0025] Figure 3 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 4 This is a schematic diagram of another embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of opening the lid according to another embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the cross-sectional areas of each structure in this invention.

[0029] Figure 7 This is a schematic diagram of the piston II structure of the present invention.

[0030] Figure 8 This is a schematic diagram of the piston I structure of the present invention.

[0031] Figure 9 This is a schematic diagram of the push rod structure of the present invention.

[0032] Among them, 1-hydraulic cylinder body, 2-push rod, 3-limiting ring, 4-piston I, 5-oil seal screw, 6-dustproof ring, 7-sealing ring, 8-hydraulic oil, 9-piston II, 10-intake device, 11-hydraulic cylinder end cover. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] The present invention provides an underwater hydraulic opening mechanism, including a hydraulic cylinder body 1, a push rod 2, a limiting ring 3, a piston I 4, a sealing ring, a dustproof ring 6, hydraulic oil 8, a piston II 9, an air intake device 10, and a hydraulic cylinder end cap 11.

[0035] like Figure 3 As shown, the hydraulic cylinder body 1 is open, with a guide groove inside one end. The push rod 2 slides along the guide groove and is installed into the guide groove of the hydraulic cylinder body 1 from the left. The outer end face of the push rod 2 is used to fix the end cover to be opened. One end of the piston I4 abuts against the inner end face of the push rod 2, and the other end of the piston I4 is limited by an annular boss provided on the inner wall of the hydraulic cylinder body 1. A sealing ring 7 and a dustproof ring 6 are provided between the piston I4 and the inner wall of the hydraulic cylinder body 1. The dustproof ring 6 is closer to the push rod 2 than the sealing ring 7. The main function of the dustproof ring 6 is to prevent seabed sediment from entering the sealing ring 7 and affecting the seal. After the piston I4 moves into place, it is limited by a limiting ring 3 provided on the inner wall of the hydraulic cylinder body 1. The limiting ring 3 is threadedly connected to the inner wall of the hydraulic cylinder body 1. Figure 7 As shown, piston II9 has different cross-sectional areas at both ends, divided into a large end and a small end. Hydraulic oil 8 is filled between the small end of piston II9 and the other end of piston I4. Specifically, piston I4 has an oil injection hole in the middle. After piston I4 and piston II9 are both installed in place, hydraulic oil 8 is injected through the oil injection hole, and then the oil injection hole is sealed by the oil seal screw 5. The large end of piston II9 faces outward and is sealed with a sealing ring between itself and the inner wall of the hydraulic cylinder body 1. After piston II9 moves into place, its large end is limited by an annular boss provided on the inner wall of the hydraulic cylinder body 1. The widths of the two end faces of this annular boss are different, and correspondingly, the inner diameters of the hydraulic cylinder bodies 1 on both sides of the annular boss are different. Specifically, the cylinder body on the left side of the annular boss mates with the other end of piston I4, and the cylinder body on the right side of the annular boss mates with the large end of piston II9. The inner diameter of the cylinder body mates with the other end of piston I4 is larger than the inner diameter of the cylinder body mates with the large end of piston II9. That is to say, in this embodiment, the diameter of the other end of piston I4 (the end receiving hydraulic pressure) is larger than the diameter of the large end of piston II9. The inner diameter of the guide groove is larger than the large end diameter of piston II9 and also larger than the hydraulic pressure end diameter of piston I4.

[0036] The other end of the hydraulic cylinder body 1 is closed by the hydraulic cylinder end cover 11. The hydraulic cylinder end cover 11 is provided with an air intake device 10, which is used to connect to an external air source to provide power to drive the piston II 9 to move.

[0037] This device has a large thrust, and different thrust and stroke ratios can be designed based on the relationship between stroke and thrust. For example... Figure 6As shown, the pressure of the air source is set to P1, the cross-sectional area of ​​the large end of piston II 9 is S1, the cross-sectional area of ​​the small end is S2, the cross-sectional area of ​​the hydraulic pressure end of piston I 4 is S3, and the thrust of push rod 2 on the end cap to be opened is F. Then... Therefore, by designing different cross-sectional areas S3 and S2, the thrust and stroke can be adjusted.

[0038] Preferably, the end face of the push rod 2 that mates with the piston I4 has a protrusion; such as Figure 8 As shown, piston I4 is a stepped shaft. The large-diameter section fits into the inner wall of the pneumatic cylinder, while the small-diameter section is hollow inside, with the hollow part engaging with the protruding outer periphery.

[0039] like Figure 9 As shown, push rod 2 can be a three-jaw push rod, including a docking frustum and three rods. One end of the docking frustum is used to dock with the piston, and the other end has three rods evenly arranged on its circumference. Push rod 2 can also be a cylinder with one end open and the open end facing outwards. Push rod 2 can also be a cylindrical rod.

[0040] In another embodiment, to save space, the underwater hydraulic opening mechanism of the present invention can be integrated into the airbag opening mechanism, such as... Figure 4 As shown, the hydraulic opening mechanism also includes a housing, an air bladder, and a seal; one end of the housing is open for sealing connection with the end cover to be opened through the seal, and the other end of the housing has a through hole in the middle for installing the pneumatic cylinder end cover; the pneumatic cylinder body is located in the middle of the housing and is an integral structure with the housing, and the air bladder is set in the housing for inflation and release after the end cover to be opened is fully opened, driving the mechanism to float up.

[0041] Preferably, there are two airbags, symmetrically arranged within the housing. This prevents one airbag from being damaged while the other airbag can still function normally.

[0042] The working process is as follows: Air is supplied to the hydraulic cylinder through the air intake device 10, pushing piston II 9 to the left until it is stopped. Hydraulic oil 8 then pushes piston I 4 to the left, causing push rod 2 to be pushed open along with the end cover. After the end cover is fully opened, air is then inflated, allowing the air bag to be smoothly released from the cavity. Figure 5 As shown.

[0043] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydraulic underwater opening mechanism, characterized in that, Includes hydraulic cylinder body, push rod, limit ring, piston I, sealing ring, dust seal, hydraulic oil, piston II, air intake device, and hydraulic cylinder end cap; The hydraulic cylinder body is open, with a guide groove inside one end, along which the push rod slides. The outer end face of the push rod is used to fix the end cover to be opened. One end of piston I abuts against the inner end face of the push rod, and the other end of piston I is limited by an annular boss on the inner wall of the hydraulic cylinder. A sealing ring and a dustproof ring are provided between piston I and the inner wall of the hydraulic cylinder, with the dustproof ring closer to the push rod than the sealing ring. After piston I moves into position, it is limited by a limiting ring on the inner wall of the hydraulic cylinder. The two ends of piston II have different cross-sectional areas. Hydraulic oil is filled between the small end of piston II and the other end of piston I; the large end of piston II faces outward and is provided with a sealing ring between it and the inner wall of the hydraulic cylinder; after piston II moves into position, its large end is limited by an annular protrusion provided on the inner wall of the hydraulic cylinder; the other end of the hydraulic cylinder is closed by a hydraulic cylinder end cover, which is provided with an air intake device to provide power to drive piston II to move; different thrust and stroke can be designed according to the relationship between stroke and thrust, and different force-bearing cross-sectional areas of piston I and small end cross-sectional areas of piston II can be designed; The limiting ring is threadedly connected to the inner wall of the hydraulic cylinder. The hydraulic opening mechanism also includes a housing, an air bladder, and a sealing element; one end of the housing is open for sealing connection with the end cover to be opened through the sealing element, and the other end of the housing has a through hole in the middle for installing the pneumatic cylinder end cover; the cylinder body of the pneumatic cylinder is located in the middle of the housing and is integrated with the housing structure; the air bladder is set in the housing and is used to inflate and release after the end cover to be opened is fully opened, driving the mechanism to float up; there are two air bladders, symmetrically arranged in the housing.

2. The underwater hydraulic opening mechanism as described in claim 1, characterized in that, The piston I has an oil injection hole in the middle, and hydraulic oil is injected and sealed by an oil seal screw.

3. The underwater hydraulic opening mechanism as described in claim 1, characterized in that, The inner diameter of the guide groove is larger than the diameter of the large end of piston II.

4. The underwater hydraulic opening mechanism as described in claim 1, characterized in that, The end face of the push rod that connects with piston I has a protrusion; piston I is a stepped shaft, with the large diameter section fitting with the inner wall of the pneumatic cylinder, and the small diameter section being hollow inside, with the hollow part engaging with the outer periphery of the protrusion.

5. The underwater hydraulic opening mechanism as described in claim 4, characterized in that, The push rod is a three-jaw push rod.

6. The underwater hydraulic opening mechanism as described in claim 4, characterized in that, The push rod is a cylinder with one end open and facing outwards.

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