Underwater high-pressure pneumatic uncovering mechanism

Abstract

The underwater high-pressure pneumatic uncovering mechanism comprises a pneumatic cylinder body, a push rod, a piston, a sealing ring, a dustproof ring, an air inlet device and a pneumatic cylinder end cover. The two ends of the pneumatic cylinder body are open, a guide groove is formed in one end, and the push rod slides along the guide groove and is limited by an annular boss arranged on the inner wall of the pneumatic cylinder body; the outer end face of the push rod is fixed to a to-be-opened end cover. The inner side end face of the piston abuts against the inner side end face of the push rod. A sealing ring and a dustproof ring are arranged between the piston and the inner wall of the pneumatic cylinder body; the dustproof ring is closer to the push rod than the sealing ring; the piston is limited by the annular boss after moving in place; the other end of the pneumatic cylinder body is sealed by a pneumatic cylinder end cover, and an air inlet device is arranged on the pneumatic cylinder end cover and used for providing power for driving the piston to move. According to the invention, the problem of insufficient cover opening under the condition that the end cover is blocked by seabed sediment burying, submarine topography and the like can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of underwater unmanned equipment, and in particular to an underwater high-pressure pneumatic cover opening mechanism. Background Art

[0002] At present, there are many underwater opening mechanisms, but few underwater opening mechanisms. The underwater opening mechanisms used include explosive bolts, thrusters, gas generators, etc. Conventional underwater opening launch mechanisms such as Figure 1 As shown, the outer pressure-resistant shell seals the underwater rocket in the cavity. The head of the shell is a hemispherical structure, which is connected to the shell through explosive bolts and pins. When it is necessary to launch, the explosive bolts will work first, and then the rocket thrusters will ignite. The gas generated will cause the pressure in the cavity to rise sharply. When the internal air pressure is greater than the external water pressure, the hemispherical head cover of the shell will be opened and flipped around the pin. The thrust generated by the rocket head against the head cover cross bar will cause the head cover to flip further, as shown in the figure. Figure 2 As shown, the rocket finally completely leaves the shell to complete the launch, and the shell is filled with water and sinks. The method of using high-pressure gas generated by pyrotechnics to open the cover is highly dangerous and unsafe.

[0003] Another underwater opening mechanism is as follows Figure 3 As shown, it is mainly composed of an airbag, a shell, an end cover and a seal. The shell, the end cover and the seal completely seal the airbag in the internal cavity. When in use, the end cover is required to be opened and the airbag is completely released from the shell. When in use, the air source will inflate the airbag. In order to prevent the airbag from being over-inflated and ruptured, a pressure-limiting valve is installed on the surface of the airbag. When the pressure difference between the inside and outside of the airbag reaches a certain value, the pressure-limiting valve will open to exhaust, so that the pressure difference between the inside and outside of the airbag is always kept within a certain range. During the inflation process of the airbag, the expansion of the airbag pushes the end cover open, and the airbag is further inflated and squeezed out of the cavity to complete the entire action process, such as Figure 4 As shown. Due to the seabed silt and terrain, the head of the product is very likely to be buried in mud and sand after falling to the seabed, resulting in insufficient opening stroke, incomplete opening of the cover, and difficulty in releasing objects in the cabin after opening the cover. The air source inflates the airbag. Since the airbag is squeezed in a small space in the cavity, the local pressure inside the airbag will soon reach the opening pressure of the pressure-limiting valve. The gas in the airbag is discharged into the cavity, causing the airbag in the cavity to rise sharply and push the end cover open. However, when the seal is pushed out, the gas in the cavity is discharged into the water, and the airbag continues to inflate, but the pressure-limiting valve discharges the gas in the airbag into the water until the air source is exhausted. Ultimately, the end cover cannot be fully opened, and the airbag cannot be fully released from the cavity. The final state is as shown in the figure. Figure 5 shown.

[0004] In summary, no matter it is opening the cover by inflating the cavity or opening the cover by inflating the airbag, when there are obstacles such as mud and sand outside the end cover, there is a problem that after the seal on the end cover is pushed out, the cavity is no longer a closed cavity and the cover cannot be opened further. Often only a gap is pushed out between the end cover and the cavity, and the end cover pushing stroke is short, which cannot meet the actual opening needs (such as the need to release the beacon, load, airbag, etc. in the cavity). Summary of the invention

[0005] In view of this, the present invention provides an underwater high-pressure pneumatic cover opening mechanism, which can solve the problem of insufficient cover opening when the end cover is blocked by seabed silt burial, seabed topography, etc.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An underwater high-pressure pneumatic cover opening mechanism, comprising a pneumatic cylinder body, a push rod, a piston, a sealing ring, a dust ring, an air intake device and a pneumatic cylinder end cover;

[0008] The two ends of the pneumatic cylinder body are open, and a guide groove is provided inside one end. The push rod slides along the guide groove and is limited by an annular boss provided on the inner wall of the pneumatic cylinder body; the outer end face of the push rod is used to fix with the end cover to be opened; a piston is provided in the other end of the pneumatic cylinder body, and the inner end face of the piston abuts against the inner end face of the push rod; a sealing ring and a dust ring are provided between the piston and the inner wall of the pneumatic cylinder body, and the dust ring is closer to the push rod than the sealing ring; the piston is limited by the annular boss after moving into position; the other end of the pneumatic cylinder body is closed by the pneumatic cylinder end cover, and the pneumatic cylinder end cover is provided with an air intake device for providing power to drive the piston to move.

[0009] Furthermore, the cross-sectional area of ​​the push rod butt end surface is larger than the cross-sectional area of ​​the piston force-bearing end surface.

[0010] Furthermore, a protrusion is provided on the butt end face of the push rod; the piston is a stepped shaft, the large diameter section cooperates with the inner wall of the pneumatic cylinder body, the small diameter section is hollow inside, and the hollow part is engaged with the outer periphery of the protrusion.

[0011] Furthermore, the push rod is a three-claw push rod.

[0012] Furthermore, the push rod is a cylinder with one end open, and the open end faces outwards.

[0013] Furthermore, it also includes a shell, an airbag, and a seal; one end of the shell is open and is used to be sealed and connected with the end cover to be opened through a seal, and a through hole is provided in the middle of the other end of the shell for installing the pneumatic cylinder end cover; the pneumatic cylinder body is located in the middle of the shell and forms an integrated structure with the shell, and the airbag is arranged in the shell for inflating and releasing after the end cover to be opened is fully opened, thereby driving the mechanism to float.

[0014] Furthermore, there are two airbags, which are symmetrically arranged in the shell.

[0015] Beneficial effects:

[0016] 1. The present invention adopts a pneumatic cylinder type cover opening method. When the air source pressure is sufficient, the thrust generated can open the end cover and push it out to a longer distance, solving the problem of insufficient cover opening in the case of mud and sand burial. It also avoids the use of explosives and improves safety.

[0017] Secondly, in the existing airbag opening method, once the pressure inside the airbag reaches the opening pressure of the airbag upper pressure valve, the airbag will exhaust gas outwards. If the airbag is not completely released, the airbag exhaust may exhaust the gas source, and the lid cannot be opened in the end. The pneumatic cylinder opening method of the present invention requires less gas, and the cylinder is a closed structure without leakage. The gas filled in the pneumatic cylinder does not leak into the water, and only a small amount of gas is needed to push the piston open. After the action is completed, the gas in the pneumatic cylinder can also be used to inflate the airbag.

[0018] 2. The present invention can be designed with different strokes according to different usage scenarios, and the cover opening stroke is large; different cross-sectional areas of the piston can also be designed according to usage requirements to achieve different cover opening thrusts, and the cover opening force is large.

[0019] 3. The present invention also includes an air bag, which is inflated and released after the end cover is fully opened, driving the mechanism to float upward to assist recovery or serve as a beacon.

[0020] 4. The present invention has two airbags, which are symmetrically arranged in the housing to prevent one of the airbags from being damaged. In this case, the other airbag can be used normally, and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the rocket launch opening mechanism in the prior art.

[0022] Figure 2 This is a schematic diagram of the opening process of rocket launch in the prior art.

[0023] Figure 3 It is a schematic diagram of the airbag cover opening structure in the prior art.

[0024] Figure 4 It is a schematic diagram of the airbag cover opening process in the prior art.

[0025] Figure 5 Schematic diagram of the final state of the airbag opening mechanism when buried in mud and sand.

[0026] Figure 6 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 7 It is a schematic structural diagram of another embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of opening the cover of another embodiment of the present invention.

[0029] Fig. 9 It is a schematic diagram of the push rod structure of the present invention.

[0030] Among them, 1-pneumatic cylinder body, 2-push rod, 3-dust ring, 4-sealing ring, 5-air intake device, 6-piston, 7-pneumatic cylinder end cover, 8-mud and sand. DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0032] The present invention provides an underwater high-pressure pneumatic cover opening mechanism, such as Figure 6 As shown, the pneumatic cover opening mechanism includes a pneumatic cylinder body 1, a push rod 2, a piston 6, a sealing ring 4, a dust ring 3, an air intake device 5 and a pneumatic cylinder end cover 7.

[0033] The cylinder body 1 of the pneumatic cylinder is open at both ends, and a guide groove is provided inside one end. The push rod 2 slides along the guide groove. The push rod 2 is installed in the guide groove of the pneumatic cylinder from the left, and is limited by the annular boss provided on the inner wall of the cylinder body 1 of the pneumatic cylinder; the outer end face of the push rod 2 is used to fix with the end cover to be opened; a piston 6 is provided inside the other end of the cylinder body 1 of the pneumatic cylinder, and the piston 6 is installed inside the cylinder body from the right, and the inner end face of the piston 6 abuts against the inner end face of the push rod 2; a sealing ring 4 and a dust ring 3 are provided between the piston 6 and the inner wall of the cylinder body 1 of the pneumatic cylinder, and the dust ring 3 is closer to the push rod 2 than the sealing ring 4; the dust ring 3 mainly functions to prevent the seabed mud 8 from entering the position of the sealing ring 4 and affecting the sealing. After the piston 6 moves into place, it is limited by the annular boss. The other end of the cylinder body 1 of the pneumatic cylinder is closed by the cylinder end cover 7, which is connected to the cylinder by screws, and the cylinder end cover 7 is provided with an air intake device 5, which is used to provide power to drive the piston 6 to move, that is, to provide a high-pressure gas source. The piston 6 can be designed with different cross-sectional areas according to usage requirements to achieve different cover opening thrusts.

[0034] The cross-sectional area of ​​the butt end face of the push rod 2 is larger than the cross-sectional area of ​​the force-bearing end face of the piston 6, so that the end cover to be opened is evenly stressed. A protrusion is provided on the butt end face of the push rod 2; the piston 6 is a stepped shaft, the large diameter section cooperates with the inner wall of the cylinder body 1 of the pneumatic cylinder, the small diameter section is hollow inside, and the hollow part is engaged with the outer periphery of the protrusion. After the piston 6 moves into place, the step surface of the large diameter section and the small diameter section is limited to the right end face of the annular boss. Different opening strokes can also be designed according to different usage scenarios, that is, the moving distance of the piston 6, that is, the length between the right end face of the annular boss and the step surface.

[0035] like Fig. 9As shown, the push rod 2 can be a three-claw push rod, including a docking cone and three rods, one end of the docking cone is used to dock with the piston 6, and three rods are evenly arranged on the circumference of the other end; the push rod 2 can also be a cylinder, one end of the cylinder is open, and the open end faces outward; the push rod 2 can also be a cylindrical rod.

[0036] In another embodiment, in order to save space, the pneumatic cover opening mechanism of the present invention can be integrated into the air bag cover opening mechanism. Figure 7 As shown, the cylinder body 1 of the pneumatic cylinder can be integrated with the housing, and the end cover to be opened is fixed on the push rod 2 by screws. That is, the pneumatic cover opening mechanism of the present invention also includes a housing, an airbag, and a seal; one end of the housing is open, which is used to be sealed and connected with the end cover to be opened through the seal, and a through hole is provided in the middle of the other end of the housing for installing the end cover 7 of the pneumatic cylinder; the cylinder body 1 of the pneumatic cylinder is arranged in the middle of the housing to form an integrated structure with the housing, and the airbag is arranged in the housing, which is used to inflate and release after the end cover to be opened is fully opened, so as to drive the mechanism to float.

[0037] Preferably, there are two airbags, which are symmetrically arranged in the housing to prevent one of the airbags from being damaged, in which case the other airbag can be used normally.

[0038] The working process is as follows: the air source inflates the air cylinder through the air inlet device 5 to push the piston 6 to move to the left until it is limited by the annular boss, and the push rod 2 is pushed open together with the end cover to be opened by the piston 6. After the end cover to be opened is completely opened, the airbag is inflated, and the airbag can be smoothly released from the cavity. Figure 8 After the action is completed, the gas in the pneumatic cylinder can be used to inflate the airbag, or the air source can be used to inflate the airbag.

[0039] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater high-pressure pneumatic cover opening mechanism, characterized in that: It includes a pneumatic cylinder body, a push rod, a piston, a sealing ring, a dust ring, an air intake device and a pneumatic cylinder end cover; The two ends of the pneumatic cylinder body are open, and a guide groove is provided inside one end. The push rod slides along the guide groove and is limited by an annular boss provided on the inner wall of the pneumatic cylinder body; the outer end face of the push rod is used to fix with the end cover to be opened; a piston is provided in the other end of the pneumatic cylinder body, and the inner end face of the piston abuts against the inner end face of the push rod; a sealing ring and a dust ring are provided between the piston and the inner wall of the pneumatic cylinder body, and the dust ring is closer to the push rod than the sealing ring; the piston is limited by the annular boss after moving into position; the other end of the pneumatic cylinder body is closed by the pneumatic cylinder end cover, and the pneumatic cylinder end cover is provided with an air intake device for providing power to drive the piston to move.

2. The underwater high-pressure pneumatic cover opening mechanism according to claim 1, characterized in that: The cross-sectional area of ​​the push rod butt end surface is larger than the cross-sectional area of ​​the piston force-bearing end surface.

3. The underwater high pressure pneumatic cover opening mechanism according to claim 1 or 2, characterized in that: The push rod butt end face is provided with a protrusion; the piston is a stepped shaft, the large diameter section matches with the inner wall of the cylinder body of the pneumatic cylinder, the small diameter section is hollow inside, and the hollow part is clamped on the outer periphery of the protrusion.

4. The underwater high pressure pneumatic cover opening mechanism according to claim 3, characterized in that: The push rod is a three-claw push rod.

5. The underwater high pressure pneumatic cover opening mechanism according to claim 3, characterized in that: The push rod is a cylinder with one end open, and the open end faces outwards.

6. The underwater high pressure pneumatic cover opening mechanism according to claim 1, characterized in that: It also includes a shell, an airbag, and a seal; one end of the shell is open and is used to be sealed and connected to the end cover to be opened through a seal, and a through hole is provided in the middle of the other end of the shell for installing the pneumatic cylinder end cover; the pneumatic cylinder body is located in the middle of the shell and forms an integrated structure with the shell, and the airbag is arranged in the shell for inflating and releasing after the end cover to be opened is fully opened, thereby driving the mechanism to float.

7. The underwater high pressure pneumatic cover opening mechanism according to claim 6, characterized in that: There are two air bags, which are symmetrically arranged in the shell.

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